Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6ad83edbbd33e3…

MALICIOUS

PDF

74.8 KB Created: 2021-06-18 21:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3123d2767d60be88c11f640c149a0f40 SHA-1: a8566f102b093b88c51018be631e50c4ae0629fa SHA-256: ec6ad83edbbd33e3edc8d13a02ffa4c92a06df9f1b5eede035bccb3cfa0c61a9
164 Risk Score

Malware Insights

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

The PDF document contains a lure related to credit reports, combined with numerous links to external sites hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic suggest the document's purpose is to trick users into navigating to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbef02d065---38316392703.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073020c0b906---jezelal.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/hgks7miu92i3onj27ihh8i7m51/rupadilowajuzadarujuwu.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/jmrahc29f9sj8afedodmjf9oih/35549407586.pdf
    • http://bajcsidavidfoto.com/_user/file/84646499997.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bd924b6502e---58714088985.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b2fc99cb---xejapexuwazibivi.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2092339e9c---45029585524.pdf
    • https://vijyaiprismcrm.com/userfiles/files/84745589610.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aeb3a0061a---51625609489.pdf
    • http://logiccpacma.com/ckfinder/userfiles/files/91843408405.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/aaa313a5565da75895eeb6b85fdedbc3/gofetuna.pdf
    • http://adabaskimerkezi.com/upload/file/52471523734.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609458f047e9e---2975335756.pdf
    • https://samowar.ch/upload/file/kenazabejenokivazamu.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bu3tnj9f8msm9lq9ci8rlbtbtq/22168687790.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/256vmcpofkcuskfdh1gck6fc9d/46761843666.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=when+is+a+charge+off+removed+from+credit+report
    • 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_off0000e4c4.bin
9c679e95a0e2d6239dc28834394b32697baa8a49b381cb786fb01f32ab11987e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 5608 bytes
font_01_sfnt_off0000f7c7.bin
d5b9d675fa95fd3643ea2cf9fdc83fbbf7060a3d7715415f71363646da2e7b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 10460 bytes