Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd5f0351d772f77…

MALICIOUS

PDF

75.4 KB Created: 2021-02-15 15:46:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: db56624868386297db073fdb28b68eb4 SHA-1: eb2853a735006c59c1a95f81a8261ef2382b7e93 SHA-256: 0bd5f0351d772f771186697a05c8e80b474fb2beb584b3593d00ddd24196f6d3
244 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm or phishing lure, evidenced by numerous embedded URLs pointing to potentially malicious or disposable domains. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics indicate a high likelihood of malicious intent, likely to redirect users to phishing sites or distribute further malware. The ML classifier and ClamAV detection strongly support the malicious verdict.

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
  • 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 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.
  • 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://yafferge.ru/wix?keyword=nutri+ninja+pro+bl450+vs+bl456 In PDF document text
    • https://xubusiruk.weebly.com/uploads/1/3/4/4/134481781/fogifodasedib.pdfIn PDF document text
    • http://belkwigs.com/sad_love_video_status_share_chat_telugu1hcsi.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/03e79074b7e77d.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/ruwoninefonija.pdfIn PDF document text
    • http://milky-rp.space/82309644298kcrnn.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/rebefoxajawikeselumu.pdfIn PDF document text
    • http://spencermcman.us/english_grammar_quiz_questions_and_answers5nsh2.pdfIn PDF document text
    • http://circulshtangcalip.website/leadership_competency_example_answers_civil_servicem291b.pdfIn PDF document text
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/wanixamabofoted.pdfIn PDF document text
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/kolagumog-vugetozax-nesaw-lunojo.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/ghgc8W3/facebook_login_name_delete.pdfIn PDF document text
    • http://love-your-lips.online/9545596186xtqvn.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/pesabexolubejepufeb.pdfIn PDF document text
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/9432810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://marivugedada.epizy.com/icsee_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/alexor_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/bodo_new_video_free.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_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 5568 bytes
SHA-256: 7a9276d3a4ae92ba4b9de15bc4d9f49a001037c8fa04d92dc06efbc19ecb0e4f
font_01_sfnt_off0000fd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4E 10360 bytes
SHA-256: 202c51dbc07914310eb1d90bccce6fe5a6275534ba0371cab2e74597d1ed6e31

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