Malicious PDF — malware analysis report

Static analysis result for SHA-256 106f628dfba9cee6…

MALICIOUS

PDF

89.8 KB Created: 2021-07-02 12:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3e2ed2a28c9e146b658575ede59a64c1 SHA-1: 9f58f6c00723b4576e221c9d10b725c5d87570be SHA-256: 106f628dfba9cee63a1327e980f5ab35b32b9eb58fe2dfdc834d90c1ac36c00f
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits multiple high-severity heuristics indicating malicious intent, including random URL generation and links to compromised CMS uploads. The document body, though truncated, suggests lures to enable content and execute commands via the clipboard, a common tactic for downloading and running secondary payloads. The presence of numerous external URLs, many pointing to disposable hosting or potentially compromised sites, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=selection+is+locked+word PDF link annotation
    • http://innovatepc.com/userfiles/file/73933823527.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16070bd47819da---kopigixajileti.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/61917811883.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/71123474268.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3099b650cb---mijijerewaputose.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32bdb93447---punufuloxukoden.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b02de8841---febanine.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/89031962569.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160790d75a09ab---55424794451.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/bdb4c05641d74ecea6cea101249f2a92/30471571119.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077abc433efa---fofusigituvikiji.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/0277e299adb8ced5840bc10dd1c2a659/xolataguwemidu.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919853e9f79---venajawowunujotatusifular.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/76448804998.pdfIn PDF document text
    • http://www.asslar.de/downloads/95065206494.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b76495410efe0277657f85272334be63/kuvituwefujudawosupaxo.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/7e4fdcc4e97e7019958e9b96838e48c2/tefaduxuporabuwafupiw.pdfIn PDF document text
    • http://mldinsaat.com/image/files/53251288881.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b8634d1c8ab95aa7f1c64e6a1b2c2f61/xonumonimi.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/zoduluzebufeta.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/e935cf5490f41565d7cbe9200dae35d5/16749316516.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/gixokav.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/c1ded147c2e91cf64fb6d7644f3b749d/53918806143.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/29569278916.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/36368819638.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED5 10452 bytes
SHA-256: ef16e8f28520e901358e9ec6cfd6888947e2e30596ee40b0e33c3fe2495b1706
font_02_sfnt_off000126aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AA 20500 bytes
SHA-256: 3631281b40e818396445f9bd3609e17bb7690b90d495d0fa6f2a82f1d4229aec

Open this report in the interactive analyzer, or submit your own file for analysis.