Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8b3d66e658159c…

MALICIOUS

PDF

72.0 KB Created: 2021-02-26 03:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 11ccc5c0a3153e6bf5697bdee948f102 SHA-1: 645fc4fb9947a705d344e28d7a6435adf83b131a SHA-256: cb8b3d66e658159c4ae45cf202e78ea80738b4608f30567a2dedff6899c0a68f
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://bologen.ru/wix?keyword=fb+apk+dark+mode PDF link annotation
    • https://cdn.sqhk.co/vituxezij/dejajgS/11725562745.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/by8ifib/jegumosogud.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/Aihhcjg/bipoduwutokewiligi.pdfIn PDF document text
    • https://vidafipi.weebly.com/uploads/1/3/1/6/131636743/cf80300a01f9.pdfIn PDF document text
    • https://kobuwejen.weebly.com/uploads/1/3/0/8/130873730/4335739.pdfIn PDF document text
    • http://wavakidagipav.iblogger.org/cannibal_holocaust_300mb_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/Kjf8jd8/30476744834.pdfIn PDF document text
    • https://doxemikawapuki.weebly.com/uploads/1/3/4/3/134314999/7791909.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/5481832.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/igfjaje/917959760.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/ccU3Utx/45235568412.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/giijcYg/lyrical_video_maker_app_without_watermark.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/ckhehdV/tofilobevugugobimede.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/xufaxoferugod/peter_answer_my_question_game.pdfIn PDF document text
    • http://lemijafuw.epizy.com/xubimefogof.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/54240070322.pdfIn PDF document text
    • http://rorodev.rf.gd/astm_a325_bolts.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_off0000dc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC45 5052 bytes
SHA-256: 2cad11807335f6e1326155853f5581f21a6e28b31ba2f132e1fc567c6bfe090a
font_01_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 11716 bytes
SHA-256: d829cb57fafda0ee8ca7cdfefb649f3bcca093b89f9e010aeda7d1664ecdee40