Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fb7cde15777e2d…

MALICIOUS

PDF

68.0 KB Created: 2020-12-24 08:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 367da54805ec7c03abaf96bc0a1ce2f6 SHA-1: 7105f5d43cabcede3de67a9744ba805e03174a0d SHA-256: 01fb7cde15777e2da3b74d7312b8762b2cf646bcff9b2b80dcf0770c8fa46d6e
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to lure users to malicious websites, likely for phishing or malware delivery.

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
  • 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://cctraff.ru/strik?utm_term=tool+box+lowes+vs+home+depot In PDF document text
    • https://nevidabaxava.weebly.com/uploads/1/3/0/7/130775666/simadek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f9f7e8f6ce00.pdfIn PDF document text
    • https://cdn.sqhk.co/titolegun/fSsIhio/mozodebapenadakejiratatib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5fb4ebe6df939.pdfIn PDF document text
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/2047271c0.pdfIn PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/f493ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd11cb33e615.pdfIn PDF document text
    • https://jabezenenadako.weebly.com/uploads/1/3/4/2/134234778/rugibutax_wivifufitar_zupinuvi_mobejozasudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460230/normal_5fcb6c7274cb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5fa72c9c240ce.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/ab9bc465-ea07-4a55-80bc-ea427378a4e6/xusolewolezogorazabegudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd75822-10bb-4a34-b28e-13300be0b9e0/the_dominion_war_episodes.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/zewebotokekegoxeluso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04cbfbe-56b4-43c2-9180-07f3a6ad3fb6/84551831310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c01dc71-f271-4a35-a489-94cce72144d4/minecraft_necromancy_mod_guide.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_off0000cc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4E 5204 bytes
SHA-256: 277a655b49b60cfed6a36925dca74acf3dc3fe0f7f1b549b16a1cea4c752184b
font_01_sfnt_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 10868 bytes
SHA-256: da353868a71b55cf5481fab2094e3f4f33b91959779270eb16d447300339a141

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