Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a8b18691d7940d…

MALICIOUS

PDF

108.9 KB Created: 2021-06-05 09:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3fd91d1d474b44802f074cc30bddc3cb SHA-1: d86c3535f190d31a9b8d462d431aaf9a1a9501d1 SHA-256: b6a8b18691d7940d4962d97b2b5a48499350c681e51b7c55ee5b2e0bd726c829
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users. The document body, though heavily obfuscated, contains metadata related to 'rock band 4 guitar xbox one cheap' and the wkhtmltopdf application, likely serving as a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

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/wb?keyword=rock%20band%204%20guitar%20xbox%20one%20cheap PDF link annotation
    • https://vinifobak.weebly.com/uploads/1/3/5/2/135298549/dewawu_xuwov_womixujosawibag_woxadi.pdfIn PDF document text
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/pegowuxevevoxasesed.pdfIn PDF document text
    • https://devigafaviv.weebly.com/uploads/1/3/4/6/134698058/5000731.pdfIn PDF document text
    • https://vilomaranetuxer.weebly.com/uploads/1/3/4/5/134502128/517033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368982/normal_600550e59a340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_602aadf695abf.pdfIn PDF document text
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/jujavumisepugonagil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464525/normal_5fee07047cc26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386333/normal_5ff4262230250.pdfIn PDF document text
    • https://biwemazisemu.weebly.com/uploads/1/3/0/9/130969041/4477833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_604d89fb41463.pdfIn PDF document text
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/a235a43faf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465142/normal_606e11df94f14.pdfIn PDF document text
    • https://babibogek.weebly.com/uploads/1/3/1/3/131379554/jetegogekeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fdc3579efb48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nubuzefi.pbworks.com/f/sesifilagetolejupijapaw.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/144655224/28538120478.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144651417/pokemon_fusion_rom_hack_online_free.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144414288/income_statement_balance_sheet_cash_flow_excel_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_off00016d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D7C 5492 bytes
SHA-256: add1abfd9e4c729ced6c4005c5285367613841b0f9d1e5bafb4613dccea7b331
font_01_sfnt_off00018039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18039 11164 bytes
SHA-256: 4930225f743e688625d40de773da8b8cff6d531e77a5fe6c668e876a05d36034

Open this report in the interactive analyzer, or submit your own file for analysis.