Malicious PDF — malware analysis report

Static analysis result for SHA-256 985a0b67c86fbfc3…

MALICIOUS

PDF

55.8 KB Created: 2021-05-01 08:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c4603de29bec42a3847ee9e4b913015 SHA-1: 4b5b6f9c9829ef0c3b7685eb512fab2dce2d02f7 SHA-256: 985a0b67c86fbfc3f259efa1adcda46ff6ebd325830f9ae2e0516c9bd22a65b3
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, indicating it likely serves as a phishing or trojan delivery mechanism. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host or redirect to malicious payloads. The presence of embedded URLs and the nature of the link farm suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7497

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://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e942e51d29---fupokidivoturofamejedema.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16087d2ee72b43---tinizezajovimukavamub.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899baca91e5---80605525463.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/73ba71c0199ddc5a7200ee4a0e7816b7/64601035982.pdf
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/a9no0e68jnbfii9v5156ndvri4/losiwigar.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a97ae2085770c12f749000792088151b/34781336225.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8999e22e8---47802978311.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2a4b7b86---lutatulurotetunosafafigar.pdf
    • http://absolutelyneon.com/userfiles/file/xagaredufiz.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc58705d6---67743155342.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fe5b7d9a1---35887108292.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0a9273639---71809187423.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/vrl2rl2bm50m628e36ef8hlbi2/fosukuvagatinene.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086967e4f750---64048132181.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/dsp7112tnphtmq5rkh2vgj3k1p/37426286755.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607380470aa46---70192298387.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/8fa1m8m37ahn9jvegn3teu8r64/83018014388.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eea0cf15c4---91776130776.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=bsplayer+android+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+apk

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