Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6267064f83fbaf1…

MALICIOUS

PDF

90.4 KB Created: 2021-09-06 16:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d398fe13e8eba2ddb161e50c0200a37b SHA-1: c6a1ea2fd199bf249cc6bbe72218aeeca4553efa SHA-256: a6267064f83fbaf1669c7b2c7069625f4abf18fa1609377442dbceee1c239b7c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a lure to execute commands via the clipboard, instructing the user to paste content into a shell, which is a common technique for downloading and executing second-stage payloads. The document also contains numerous links to potentially compromised websites, suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3310377dec---61240711428.pdf In PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/46166383686.pdfIn PDF document text
    • http://atallmed.com/userfiles/files/gokiseguxotitemaguxad.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/62472026171.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/ruponasaminag.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/b181c7327bac677a8a8b3878866b0142/ruzatewinijebobadegileka.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e644eedcc---28525835866.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098b09aece6a---82157348734.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/68ca1ec201695559d6d5b68432f7be3f/tudapoxavusuwuwedad.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/zodolepugilitijir.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160828ad1e8086---tejexanexinid.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/nisasekavokedinofiv.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/75531262792.pdfIn PDF document text
    • http://iworking.vn/uploads/files/61684713070.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161147e5fe0503---1117814898.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/kemurefatodibix.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ra2067lrbskl95sctmni32bcmm/zalotidazoliwevu.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7f7a070f---vuserudazikewawakenawiz.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/pidomutoxafixedisavulur.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/vewefogojijazasajaj.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/buzewoseduvofejilok.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/kexafukununivifajagaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=debian+terminal+commands+pdfPDF link annotation
    • 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_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 10924 bytes
SHA-256: 90e279d10e524fc27220ff3a2ac539aed37fc4c1fbd27a81d50c51e3a2dd6a14
font_01_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 20384 bytes
SHA-256: 589451237a4a293ed69bc34a144f612bc5f26c9896cf645f3c2cfb3172f1648e
font_02_sfnt_off00014457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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