Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff3e0ec06a1c6a5…

MALICIOUS

PDF

74.6 KB Created: 2021-02-23 14:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2435a6647dde8b23a58a2a164e57e05c SHA-1: 893caa7aac68bbd55c7e0a7547293f12914b0c39 SHA-256: bff3e0ec06a1c6a593d16762af185455fbd39bc02691cdfd2e647cdbb25a7f48
146 Risk Score

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/123?utm_term=conflict+resolution+in+the+workplace+powerpoint PDF link annotation
    • http://damodudajipofem.22web.org/konezakebedunaxadad.pdfIn PDF document text
    • http://mifuvaxikibowi.22web.org/upkar_physics_book.pdfIn PDF document text
    • http://besemafobekilir.22web.org/room_reservation_letter_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_5fdc7c83a453e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_5fe6320bc6a0e.pdfIn PDF document text
    • http://xidakuxekon.22web.org/marvel_ultimate_alliance_3_costume_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484605/normal_600578a273772.pdfIn PDF document text
    • http://gigewaxupupixe.22web.org/25923092641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_600deac3a7e6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafunidubavilo.rf.gd/85894588731.pdfIn PDF document text
    • http://piretiwojof.epizy.com/53557027862.pdfIn PDF document text
    • http://kedumojuri.rf.gd/pesoxusuwunat.pdfIn PDF document text
    • http://juvemekexiki.rf.gd/hydrogen_sulphide_safety_data_sheet.pdfIn PDF document text
    • http://gavojomizam.epizy.com/77504007469.pdfIn PDF document text
    • http://nanesipub.rf.gd/where_do_i_oil_my_kenmore_sewing_machine.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 5164 bytes
SHA-256: bd407769b4f19873b5168f0d4c0e6eca1a4d378dd83f9af842ad533773ed5530
font_01_sfnt_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 10596 bytes
SHA-256: 58578ce8bf1639a68d26f974b3c2b08003e684265b650312cd77c15bd79244e6