Malicious PDF — malware analysis report

Static analysis result for SHA-256 acafd5c020989e16…

MALICIOUS

PDF

47.3 KB Created: 2021-02-17 20:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9579da97a3d6af112d97fbad8493b058 SHA-1: d414e5e876eb903c8ffdce5316732303f800da76 SHA-256: acafd5c020989e165420dfe7a3755636033247c1022a0d8f1d97c859ab74dcd6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with one specifically pointing to a link farm designed to redirect users. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of multiple distinct hosts and UTM parameters suggests an attempt to obscure the final destination and track user interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8572

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://seumenha.ru/123?utm_term=dodge+grand+caravan+2008+fob+battery PDF link annotation
    • https://sudegefaxir.weebly.com/uploads/1/3/5/3/135323135/11a682.pdfIn PDF document text
    • http://kalavar.xyz/34300055395socti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5fcef4433666a.pdfIn PDF document text
    • http://store50off.info/woxogudomiziladoxepiz03muv.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/gaxozevawuk.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/e8124.pdfIn PDF document text
    • http://mini-cam-v2.club/sewilanotus5w9y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393755/normal_60067257f126f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fef9f7b88222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5feba1f7a78c0.pdfIn PDF document text
    • http://udilische.club/chemical_reaction_and_equations6cgoa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_5fd8870095fcb.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/9732878.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/166c426faec.pdfIn PDF document text
    • https://mesifadenox.weebly.com/uploads/1/3/4/1/134108947/8353442.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/witutivuxegabojukexeruku.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/sailor_moon_crystal_jupiter_transformation.pdfIn PDF document text
    • http://nadezuj.epizy.com/bikivixelulititar.pdfIn PDF document text
    • http://xejarejunap.rf.gd/chrome_ubuntu_deb.pdfIn PDF document text

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