Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d2004d96eb0407…

MALICIOUS

PDF

72.5 KB Created: 2021-03-16 15:10:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1d83b2a1fa0c8ef490e66ee0b48cb553 SHA-1: b80b2ee74364456758952359ba571de0dfa5a36c SHA-256: 01d2004d96eb04079056f78811e2bdc8bd87c80899691c1447b6d993d8aade76
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for SEO manipulation or malicious redirection. While no scripts were explicitly extracted, the nature of PDF exploits often involves JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://kuzutuzo.ru/wix?keyword=wind+turbine+explosion+horses PDF link annotation
    • http://akvatehnika74.ru/6294679465lnwl2.pdfIn PDF document text
    • http://walkover.me/jetamodux64jro.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/xaxaxesopaxozowoxodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_604cdf08ced74.pdfIn PDF document text
    • http://gavokofubafixi.getenjoyment.net/epidemiological_transition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_601aacc5d9dd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_602a40bba6877.pdfIn PDF document text
    • http://bostpolamos.site/tadelupedizuh715v.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/merriam_webster_rhyming_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/cXifOia/torn_meniscus_surgery_cost_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_604786f290f8e.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/jh59vgg/kiwujitegapaben.pdfIn PDF document text
    • http://pasetbs.xyz/samsung_smart_tv_remote_control_aa59eg6ey.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/jhhbFgd/73236489879.pdfIn PDF document text
    • http://onlinekartiadesi.com/73883394262e721g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481522/normal_5fe17d9672159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_6017c3bd8c669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465277/normal_5fd163cfcbff7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39909618-5306-49a0-876b-273782fc6858/wezusakixakejorixosekat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba08e88-ce38-4235-b1b3-79c3fa85f0de/how_are_the_organisms_classified.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_off0000deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 5060 bytes
SHA-256: d41b431494cc04b0077e833a8c7c213fb78e367c531277124cb7cae9de7dcfe6
font_01_sfnt_off0000f024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF024 10864 bytes
SHA-256: 5ce98f821b96a5c4530ff41a6766708b0e0e1bd4fcb40b60665faa036a522850

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