Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cef81463db3188d…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 14:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 947f071ddb7f1712e9e053986e746177 SHA-1: c3910a484721e99467404b21b9caa30903033aa1 SHA-256: 7cef81463db3188d4bad127b03408f2c496932691bdfcd13316dc261cf798192
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, specifically a lottery or prize lure requiring parcel delivery fees. The document contains numerous links to external PDF files hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content or redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078155bbeab8---22223296566.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/a809a8711cb9fd49a282c323972e39be/xarit.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfde777bcd---jasozebu.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/q3ac25iic004rlg4rcken9co36/77594504272.pdf
    • http://www.annaleehuber.com/content_files/file/zesiwijoxomaxezugep.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608334e064824---32010497740.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094c3758936e---66579904062.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/3cf1eef972d5644cd4820aba46b19bf3/72426940479.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/12d0e6d3ff1517568e037288192a0d10/giboxukiduv.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/340857703a7943abd35d460e5148840c/41804101408.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160713020360a6---fovodavofigodiza.pdf
    • http://thunderstar.cn/userfiles/file/20210614101140162584422.pdf
    • http://splogservice.ru/content/file/83162837216.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaa7b20a47---mepivizetelumuwa.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/1mtj0dgee2gtd7j0ntpj4q3j4m/99626268733.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8fec1d7f9---vinotepegova.pdf
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/jaripixe.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/2f13206b8c9ba4a61081cf7e7860c9a3/kexugivugafutevifibax.pdf
    • http://www.ecvbrass.ch/user/web/file/xapoligari.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e228d9641---66685895287.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0a630cf2d---84822921095.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f03034c60---tinaperivowa.pdf
    • http://ajivikafinance.com/userfiles/file/80407084310.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/mu4bqv146l9vdh8aaq5esprtd5/ginotevizaguduvuvok.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=an+introduction+about+myself
    • 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_off0000ecde.bin
4190002d6daaf9a97825a34b85975901384a32658462a50781fbd6962546f88f
pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 10972 bytes
font_01_sfnt_off0001066b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1066B 16792 bytes
font_02_sfnt_off00011e7d.bin
804e8d926d7bf93b75f9a9ef6b28e6c6005e648142c6b1664763b400b5aec8da
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7D 17296 bytes