Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca1a4a900855e41…

MALICIOUS

PDF

73.1 KB Created: 2021-02-20 21:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cfaf8ba9aa5eea8c64f6e3ad4e6c3e5f SHA-1: e238a404cf061d70f7277bb521384d0c13662cf5 SHA-256: 8ca1a4a900855e41258d42fc07faefe0f5174a02b127747105b314dcbc7d9ba8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=labview+skills+guide PDF link annotation
    • https://cdn.sqhk.co/romilononove/kjgshjT/17749051617.pdfIn PDF document text
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/7c073.pdfIn PDF document text
    • http://maykistore.ru/77347946000jta5.pdfIn PDF document text
    • http://xugafigipi.22web.org/zenugix.pdfIn PDF document text
    • http://thesimplycompleteseries.com/acknowledgement_in_practicum_reporth2rfn.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/cwedhis/puffin_web_browser_apk_uptodown.pdfIn PDF document text
    • http://fafasun.iblogger.org/kali_linux_nethunter_android.pdfIn PDF document text
    • http://lalat.space/342686056589318q.pdfIn PDF document text
    • https://cdn.sqhk.co/tekonunise/ifgejdQ/muvasukusamamadedare.pdfIn PDF document text
    • https://lurugidapu.weebly.com/uploads/1/3/4/3/134315770/xerawerinumod.pdfIn PDF document text
    • https://pelazokud.weebly.com/uploads/1/3/0/7/130775509/2bfc5e749.pdfIn PDF document text
    • https://cdn.sqhk.co/sexasegavon/gFFjfbd/fobudonibiwak.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/vosimalume/59395961659.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/telugu_movie_free_mp4.pdfIn PDF document text
    • http://rivapuremamoge.epizy.com/71102226664.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/pros_and_cons_of_studying_abroad.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/one_minute_manager_meeting_template.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_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 5192 bytes
SHA-256: 9443302ac3ad489fbc18723d47dd0f834b6865955ef85f0223712fc895164a77
font_01_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 10004 bytes
SHA-256: 49b594fcf6324471edf3a0479c0bcc2c9db71eaf763538f9a9bb6b99debd0a1b