Malicious PDF — malware analysis report

Static analysis result for SHA-256 befcb34d3adfdf77…

MALICIOUS

PDF

81.4 KB Created: 2021-07-08 08:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02b89e2c567736b1e8230ada1edb9661 SHA-1: f80ab05d06c8c0a0676e73f719608f7b68137c42 SHA-256: befcb34d3adfdf77daa504ab61147609a5720bef308172b16104d3e687558904
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to phishing or malware download sites. The document's structure and embedded links align with common business email compromise tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://wastran.ru/uplcv?utm_term=policy+holder+for+this+insurance
    • http://riskhedgetech.com/uploaded/file/199170623460abf36d74ef5.pdf
    • http://adance0112.com/upfile/editor/file/lolotumapemivapixi.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/f152ab848b8c3c16a2fd37c28557b13d/59662862493.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a09a8692416---memopitorejizabor.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/26105680180.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aea7e882c---70269919705.pdf
    • http://kvbm.org/pds/userfiles/files/65940425392.pdf
    • http://denge.aero/upload/files/39045095785.pdf
    • https://zahnersatz.pl/userfiles/files/85722257363.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b84f7bc49---25175557933.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/3trn1u0ltqk09m69egnfs5hade/45870186056.pdf
    • https://hirurgija.me//files/gugox.pdf
    • https://vmwarts.com/ecovic/file/38240501138.pdf
    • http://codemessaging.net/ckfinder/userfiles/files/61799916343.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/3112f268ad2fe6c011380225e2f9b0cc/tolawefewimarubutifem.pdf
    • http://co-mit.com/uploads/files/23145542984.pdf
    • https://peltonfell.org.uk/ckfinder/userfiles/files/tedonumakupulok.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf374242f4---rumilakimitufenige.pdf
    • http://kameleonhastanc.hu/files/file/purusesujusivewi.pdf
    • https://secolink.sk/userfiles/file/95230188489.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e05a8e48bb---90214814201.pdf
    • http://guojingmall.com/userfiles/file///virosevemoruwapobuxa.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b21d0f379de---56493553189.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ca7312c54---renakisewilamazeka.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da2a.bin
9718a4a47b428dd93155f00d89d227fc79b9493f3c626440998a2d51c98216d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2A 16716 bytes
font_01_sfnt_off000105b1.bin
c85607f5eed8372facf6d738f1bf63c59df208eea6b0062cc4c6bad1e832e156
pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 10788 bytes
font_02_sfnt_off00011e89.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 16792 bytes