Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adcb6555d7c63e7…

MALICIOUS

PDF

51.6 KB Created: 2021-05-26 14:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3295b33269b81c98fd4f0857ab42e1 SHA-1: c3e00a090f0ef79e069da16cc8731f1cf637e0e8 SHA-256: 3adcb6555d7c63e7d31d4592b871feb4342a758ebb01b7d3e794f0c12c9174c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm or phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to marriage biodata, likely intended to trick users into downloading a secondary payload from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6779

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 https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c90bu9olgb5ucu1ihlprk0dutq/41595547740.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/tg0l3j0e95mhe7kjfoks86o3li/ratimolo.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef1df378e9---26304555981.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ofkkfnpg4vef6rkf7fl7nl1a92/juzigiguzog.pdf
    • https://tedvandergulik.nl/userimages/file/71387365765.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed5b288c3d---88365045886.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/u4d0rdq5ipp5obk7352c680pf6/44810661591.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914bac6d822---jomadofasef.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/72arm3897tinjr88aqn13q8c0f/xokenefonisopupomexidire.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/4nm4h22frqec81i98rn37dpl91/zumeloboziginom.pdf
    • http://anhbanglaw.com/userfiles/file/20706392647.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a711ac2f9---36754284617.pdf
    • https://mvpartners.be/images/uploadedimages/file/vigerosejawafuvopunupoz.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160805349d315c---35260024848.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=indian+marriage+biodata+word+format+for+boy+pdf

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