Malicious PDF — malware analysis report

Static analysis result for SHA-256 479232b64954c06c…

MALICIOUS

PDF

174.0 KB Created: 2021-08-01 23:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b28d958056cd16ab3d1275e5f9ea6ed SHA-1: 070d586e7c6d2f748819185c9c5bc3f9e1f23609 SHA-256: 479232b64954c06c7798bfc59e33e7e87a6c5226a30b76676949d8e2a2a2143d
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan. The document contains heuristics indicating it's a link farm and attempts to lure the user into disabling security software and executing commands via copy-pasting into a shell. This strongly suggests the document is designed to facilitate the download and execution of a second-stage malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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
  • 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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smilepaper.tw/archive/upload/files/mogubamukixo.pdf In PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/afb1c71a43070fd2858ead7898b15a07/64957692784.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c2d6fb75022f7b997ba1e96f602de817/vafamifad.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/sususanedalimugoferu.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/74097520888.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/vavasumezunimubidar.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/40732711029.pdfIn PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/sezasaf.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42aece4345---wawaxomuxugomifigakivutef.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xujepumulati.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/07b48233226ac533c2b80e9199a03e28/zusojedirujobogarefum.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/e08330a720422dac299aa364ecdffebe/86448676810.pdfIn PDF document text
    • http://hrudolf.com/userfiles/14554694117.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1623280636927117765.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/97687980939.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/zuwileruragukuk.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/791aa463c792030e828bc89327ad8e7a/43999703147.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/lobarukexajivinat.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/90469343968.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/gvfdjq11n1ulgp3dbe0po8gqra/11186466214.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/monelekilimul.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/6175123526.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0fa0edfe5---vokuzipog.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/54459786335.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/pinekedejalivopogida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=w%C3%BCrth+wow+software+download+deutschPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22BD8 19504 bytes
SHA-256: 7ebd725aa1f125905d0e17e16e4e4c0d07cdf68e674a8a8df0d724a0eae1c8b4
font_01_sfnt_off00025f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F52 16404 bytes
SHA-256: 6f45d6a67967d814e09e87a5c464fa1bcd304dfd158731b089a0b59db189a59d
font_02_sfnt_off000275d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x275D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00028ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28DED 10852 bytes
SHA-256: 86b7d7faae216238fac5efe7ab669395946a1119ffc6fb4a1921d6eccc8c198d

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