Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c12d86bae5bd57…

MALICIOUS

PDF

82.2 KB Created: 2021-05-12 00:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9964c466859f6e07ac58c40e042dafca SHA-1: ad3b0131cfd467726dc80d027df4554f29a8c0b8 SHA-256: 17c12d86bae5bd571001fdcba0f3c71bbf7206a7ca1885c0bc342f0f6071404c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The document body, though heavily obfuscated, appears to be a lure related to 'fox sports tv guide today', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://infrive.ru/uplcv?utm_term=fox+sports+tv+guide+today
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d98658e641---92895564313.pdf
    • http://allprintusa.com/admin/images/file/waxawasodopikul.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/bqffieochqdnp03sqg35dhbi96/kixulovinikutaweme.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca2a38026---tudujudewajotaperewav.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e47ac0da8f---21066746441.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/5aa44fb5b51fb8bb2ca03f4ae19620de/15442573737.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083da5119e36---jenidunoteluxuvowosulijin.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/eqvjhl94ro6jib534lp59mgqbq/45809570554.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609570193c634---dopudesedawopugese.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd2f51cf75---dixazapurare.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3bc62af3c---vuzasawa.pdf
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/fvke0ojcalssu0i602bgaqf900/gidowagelizidugupuj.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/kgic6rqq59pqj2hi0e307dng4u/malax.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/30bb382fb5be94c7e231849df2344b85/vozananopagulovoxadew.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073f5e68d986---kifumadonot.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091c9521d2ab---famelenonatuwojir.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fd5fc224a---kolakeliwediked.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104da.bin
f87ee466a58c19349e520b58568c29d23269c96fa3f2e2e2f38a287d5de40fde
pdf-font-stream PDF embedded font (sfnt) at offset 0x104DA 5280 bytes
font_01_sfnt_off000116f2.bin
5f51b2b83de2499c579327d2823c55d5eefabd5a017180f9ee6f855e34e3957d
pdf-font-stream PDF embedded font (sfnt) at offset 0x116F2 11168 bytes