Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce71e5088f5090c…

MALICIOUS

PDF

42.8 KB Created: 2021-08-29 17:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbc4a74b5ca4916761a096425a7ed4ba SHA-1: 0becc53355dbb9716e95697b3548eee7aa8bc39c SHA-256: 0ce71e5088f5090ce0c7d4c27942f4d5cb6d7c9675227403246d3c5c52506859
154 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple external URLs, many hosted on compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to phishing or malware-hosting sites. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6899

Heuristics 5

  • 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 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
  • 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 http://www.asslar.de/downloads/mevuriwo.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/971644a7833a94a33039b179ef6b3277/86169920378.pdf
    • http://netpost.vn/upload/userfiles/files/sodimama.pdf
    • http://vasvaripalmuzeum.hu/upload/file/nizomutesamavefaviwurez.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/ff7c8d115ac53bb37ba66c7f5bc7d8cb/papuretinet.pdf
    • https://fid-data.fr/app/webroot/uploaderfiles/nimasof.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/9ikinvbis1dsk3k32m4bgvpesa/geluwogik.pdf
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/rurikapusuloroduve.pdf
    • http://ondrejkocar.cz/img/file/66884796620.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+summon+lightning+on+a+player

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