Malicious PDF — malware analysis report

Static analysis result for SHA-256 f582d545ee18a1e4…

MALICIOUS

PDF

109.3 KB Created: 2021-06-28 11:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e436fe0ebb23a140a961227792c8d3d2 SHA-1: 2973b616e460c57d80ed00bf5fd6abf34105cea8 SHA-256: f582d545ee18a1e4df4affaf4b7cbff94e99667d50ddbaf28820728ffd669c74
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads, likely serving as a distribution point for further malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7538

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://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/0bcbec4fc6b2dbf4b1fd237c819f5674/70123539030.pdf In PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/05a4fa9008343d05fea6bee0b85d72d8/tevinur.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/gotanogalefupuvelasebe.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7154dad6aeb92217fa1a43f46291b4d6/22141271410.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/79509839155.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/gubejavurav.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/mizelapefum.pdfIn PDF document text
    • https://laps.pl/userfiles/file/63377643638.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/hnc1htu57q2bflqej502uebtcm/99268080759.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/jno19j0kfigp5cgn0l3a2polm1/79541269118.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/zopibaguziwi.pdfIn PDF document text
    • http://thedreams.cz/files/78353893616.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/8397b6efc6141bde560f4c4685b47ee7/10041054776.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1396bd561---19502786991.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d073d8072c---35806369817.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/16932596367.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076310aa47d7---kamapurides.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b3b461910---sexodemuviwepadazajor.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/garamogizeba.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/2ab6d4666f2aaaebca53a5574329d161/19238220836.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/iahc4aomvn79hju45r7626g0a7/denedofevufigux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dna+single+stranded+binding+proteinPDF link annotation

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