Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb9f5f97a4fe7cc…

MALICIOUS

PDF

73.9 KB Created: 2021-02-05 23:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a467c5debb7a1fdf98e185130a457a74 SHA-1: 6ab6189190f9238bac6c564dd9a4aba527771ee6 SHA-256: 3cb9f5f97a4fe7cc6ad2b96a886856dad1f3298dbf843214c47e93c418634b5b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=free%20%20back%20wars%20mod%20apk PDF link annotation
    • https://cdn.sqhk.co/konidadelan/gf1Ogjz/879047490.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/vigusap_fedasusaputukoj.pdfIn PDF document text
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/kajalinitu.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/rebisipokeg.pdfIn PDF document text
    • http://lady-bug.club/18427847998h2opl.pdfIn PDF document text
    • https://lakiromepokina.weebly.com/uploads/1/3/4/5/134589127/judelimozi.pdfIn PDF document text
    • http://reduslim-italy.site/general_aptitude_questions_and_answers_with_explanationcxttj.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/4ghuDV5/samsung_music_ads.pdfIn PDF document text
    • https://kisinamaku.weebly.com/uploads/1/3/0/8/130814290/6972300.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/jbjb8ih/skullgirls_fighting_rpg.pdfIn PDF document text
    • http://antinomi.design/the_picture_of_dorian_grey_oxford54unc.pdfIn PDF document text
    • http://hotloveme.online/468414770823j3jn.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/h7Cjahe/72315200967.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/gopher_fallout_4_modding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/ambarsariya_full_video_song_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_off0000e283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 5440 bytes
SHA-256: 5840d22c666aaf9cc89d6fce2d57eb1abd0454465c18e520eae8cb57dd92646a
font_01_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 11620 bytes
SHA-256: 69743febe52d58aa898c96d45c71b2247acf7e27bc32f5e4f8833eb49c16134c