Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fc52f78fd4b268…

MALICIOUS

PDF

67.2 KB Created: 2021-02-09 22:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b6b4393c2c08dedbe68b8e735929d746 SHA-1: cabce6988d74d38f47cc26fa36df8acd876fc94a SHA-256: c7fc52f78fd4b2681a9607a18dfac14df9ef13e390c5c136c5a9f03f3f2d7092
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://maypoin.ru/square?utm_term=android+room+primary+key+autoincrement+kotlin PDF link annotation
    • https://cdn.sqhk.co/xopigotax/gbWyogj/flippant_used_in_a_compound_sentence.pdfIn PDF document text
    • https://cdn.sqhk.co/ninasodivofi/2ifigia/zusitubuwedanotabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_6016cc1e1d41e.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/Mghsw0h/dualies_with_booyah_bomb.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/4402f5d.pdfIn PDF document text
    • https://wakavofidokevi.weebly.com/uploads/1/3/2/6/132681750/zusazem-rajuxi-wuledosojoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/hj5jetl/tennessee_titans_roster.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5ffca0fbd3487.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/OjaMhhD/lunojesosisunekutuxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6018192c06b70.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/zubilutevigeparo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457862/normal_6003003eddebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421050/normal_5ff7d02304fb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lafasusatar.rf.gd/nowogopolov.pdfIn PDF document text
    • http://gizugutopaf.epizy.com/battle_realms_1_full_version_free.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_off0000c7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 5196 bytes
SHA-256: 0240ba4878cb90cc5f2faa21b9bf0bba7442527f0c391701981f8788dfe6a6bf
font_01_sfnt_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 11272 bytes
SHA-256: 974a8fee6c891544a7684d0fde24069617b6f3bf4a5e593c6a176e44c358a2d3