Malicious PDF — malware analysis report

Static analysis result for SHA-256 839aa65d2e1f8933…

MALICIOUS

PDF

75.9 KB Created: 2021-01-28 00:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e150a435986246104761c47280ef38dd SHA-1: 18af846a912428904f4b891f52ceae1dc15fcc9d SHA-256: 839aa65d2e1f8933535b52784d4af2ca1b2a8ed95a20e1a06327bb7ebdce46ad
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=beard+grow+xl+side+effects In PDF document text
    • http://digozulujatozuj.iblogger.org/g._i._plain_sheet_weight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fe25531291e7.pdfIn PDF document text
    • http://ijmalan.xyz/5408712500445nkj.pdfIn PDF document text
    • http://finovadi.iblogger.org/44234465653.pdfIn PDF document text
    • http://sefesojobibif.iblogger.org/62743156579.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/bukeveletizakitobimq7v1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476938/normal_5ff713ba3849a.pdfIn PDF document text
    • http://zazeteku.iblogger.org/vewetefuxasojeze.pdfIn PDF document text
    • https://cdn.sqhk.co/jexozumumanu/egdhdfv/extreme_car_driving_simulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_60119b30c4e1d.pdfIn PDF document text
    • http://mizusowe.66ghz.com/lalaratuvibeloderatokalem.pdfIn PDF document text
    • http://damvglaz6.xyz/50821857694s5xhc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476268/normal_6007e40d3fdc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tojikesopi.rf.gd/gofaxisipo.pdfIn PDF document text
    • http://soxomidil.epizy.com/rebexabonabezuluxalo.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_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5400 bytes
SHA-256: 6de90db85b001f9aee5a03e3bf82d87b6369e72457ffa65b594294f0d9583d56
font_01_sfnt_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 12004 bytes
SHA-256: 74c124202807c889596666839cdc89b7dfaef7ae6925aa56b49c5b5a62705346