Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f568e5ff4dc359c…

MALICIOUS

PDF

79.4 KB Created: 2021-05-05 18:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bf2040091c5ef58eb7f74ef6e4f30183 SHA-1: 8b6dbf5347b9f9b37ee8676562d3ee4679d4d642 SHA-256: 2f568e5ff4dc359c3af074c7c70317e096c163e08a01e8500ecbd8c83d9be12e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=2008+dodge+grand+caravan+coolant+leak PDF link annotation
    • https://tovegema.weebly.com/uploads/1/3/4/5/134505564/sopazadol-roneredo.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/9450219.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gcA7ogf/52704350557.pdfIn PDF document text
    • http://pedalini.club/lolita_novelxzw8i.pdfIn PDF document text
    • https://xafarigokexugu.weebly.com/uploads/1/3/6/0/136053206/746ad3.pdfIn PDF document text
    • http://esclub.info/the_chronicles_of_narnia_prince_caspian_full_movie_online_in_hindiigqsf.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/VlBhdgf/fire_and_water_damage_restoration_certification.pdfIn PDF document text
    • https://detatabuloto.weebly.com/uploads/1/3/5/3/135346227/tunizuse-tosajituxasef.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/1dd1f92a0.pdfIn PDF document text
    • https://zejosawazir.weebly.com/uploads/1/3/1/8/131856185/kobuvazimuj_jipigosebi_pugefi_rewog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_6027ca0480d58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5ff6d4051c0aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d5439f-acd8-4a3c-8aba-3c273dacf8df/39446398097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c70ab1-b946-4b41-8672-588ba9fed3a9/how_to_test_gm_oil_pressure_sensor.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_off0000f98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 5428 bytes
SHA-256: c97cfbdaa678d784c0127e4470cd2594b4c66530f535dfa86e063cf3422a0d4c
font_01_sfnt_off00010c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 10728 bytes
SHA-256: 56281f68273002a993da54f19f345ec87f527b8ea97c64749b344689262e173f

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