Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5baabeddca0b87…

MALICIOUS

PDF

55.4 KB Created: 2021-09-03 02:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7368c8a7f3c302a156a261428a6dcdc5 SHA-1: e5494e1b8f588feb6918dc9f3d0bb63a6b300c9f SHA-256: 1c5baabeddca0b87a937d611c4526f1666cc1d57100102a06cc5fec6b41c3e26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to redirect users to malicious destinations, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6436

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://aiwatopup.com/ckfinder/userfiles/files/vijivuwadovaramil.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d300af0529---nanekolovedegekokon.pdf
    • http://www.cenlafilm.com/siteuploads/editorimg/file/30516853335.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160989ee016622---12380301409.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f88f9a4e4bd---guzapoz.pdf
    • https://familienbilstrup.dk/userfiles/file/zajuredotifiviporo.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49f82b9ba3---15981378356.pdf
    • http://icltindia.in/userfiles/file/pawerenizuxebibapevub.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e7dad5f0a4e---27308878990.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb56ee0e34---75588312958.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8edec7b17f4248d29a4f8951260b7572/16453107536.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/2050d2cc39bd2236c06d92c114cfeb71/33793746656.pdf
    • http://ydyb.com/filespath/files/20210903065911.pdf
    • http://izhar-energy.com/userfiles/file/7892626952.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/lfng6ru6215v2uq1i3e9sngmk7/lukudikaxunorup.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/m8lofn57ae7ftjlen4ih0mpqkn/7291648791.pdf
    • http://ackerviewguesthouse.com/userfiles/file/jasogitakevarunifeg.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070027e1c789---juruw.pdf
    • https://wavemed.it/wp-content/plugins/super-forms/uploads/php/files/9d9d04da20dd53260f923cb10a8a0dcb/jotezapibo.pdf
    • http://sunrui-ti.com/d/files/24250732791.pdf
    • http://njf724.com/basefile/janatalnajafcom/files/guxatewivuwebaju.pdf
    • http://mega-treid.com/userfiles/files/977038937.pdf
    • https://md-bud.pl/szklo/photos/file/88373769023.pdf
    • https://dichocungtoi.com/userfiles/file/38662168285.pdf
    • http://morethancars.nl/uploads/edytor/file/82147685795.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=physical+education+class+12+pdf+book

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