Malicious PDF — malware analysis report

Static analysis result for SHA-256 03963ab2a473a198…

MALICIOUS

PDF

76.8 KB Created: 2021-02-27 19:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7df9d967e8e38c06c27fa88f889bff5 SHA-1: 9bb63a7b71985b1855258f08bb0a019460fd9ed9 SHA-256: 03963ab2a473a1982ca880b19d87587b34ebd76cf3533d010d94fe204f247918
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://vilenefex.ru/wix?keyword=xtremepro+4k+wifi+ultra+hd+sport+camera+review PDF link annotation
    • http://wugafis.66ghz.com/7439578049.pdfIn PDF document text
    • https://jiwebatije.weebly.com/uploads/1/3/3/9/133997557/7305321.pdfIn PDF document text
    • https://wanevowak.weebly.com/uploads/1/3/4/4/134465130/6820769.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/tekugusexiregokowad.pdfIn PDF document text
    • https://revunisukigi.weebly.com/uploads/1/3/4/8/134849871/3931797.pdfIn PDF document text
    • http://doxalasi.mywebcommunity.org/mesa_boogie_triple_rectifier_manual.pdfIn PDF document text
    • https://mugibamarenov.weebly.com/uploads/1/3/4/1/134109107/lefenifobebev.pdfIn PDF document text
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/zalonojig.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/22486692058.pdfIn PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/wijobuwovoliwujuzoz.pdfIn PDF document text
    • http://gagujusapiji.iblogger.org/sinkmaster_750_garbage_disposal_parts.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/8831970.pdfIn PDF document text
    • https://wilasumoleliwu.weebly.com/uploads/1/3/1/4/131414134/8b11ac0.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/wupewanukabiwala.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/5635949.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nojikigor.myartsonline.com/use_a_geometric_formula_to_evaluate_the_integral_calculator.pdfIn PDF document text
    • http://modenizax.epizy.com/50995274908.pdfIn PDF document text
    • http://lobaman.epizy.com/word_puzzle_game_answers.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_off0000ed25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED25 5676 bytes
SHA-256: 0bd89411f9b9ac033a539715a5d2d50833bf40679df55375ac20c69166e7e76e
font_01_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 10904 bytes
SHA-256: 4747189019f532fe8e22d23b3831336a22ab618a6bbc82269155f6d6f4bc269b

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