Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac746eb66339d80…

MALICIOUS

PDF

94.2 KB Created: 2021-01-01 13:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0f38318293bde63bc2e97a511c172de9 SHA-1: e18f5f7a54f6b192ae8cae0b2fafac593d06a226 SHA-256: 1ac746eb66339d804a5b4f31bcc1b310c4049c6e1bff928e7326d6d7812bdb80
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector at 'traffmen.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to strategy games, suggesting a lure to disguise the malicious links.

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 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.
  • 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://traffmen.ru/strik?utm_term=tactical+land+turn+based+strategy+war+game+ios In PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/ponojugamuki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_5fc55865b5817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389352/normal_5f8dc9e9483e3.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/wekawopurewegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527747/normal_5fb609d3c4b19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f8bfdf24b018.pdfIn PDF document text
    • https://lesorini.weebly.com/uploads/1/3/4/3/134376350/makunupafat.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/ltIjfih/sudoku_game_print_evil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_5f8d451ece269.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491927/normal_5fdf0db83fa28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/gurejofesulabumusime.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/pepixufapipofulusogoriv.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/buddipole_antenna_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/70721736072.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E5 5540 bytes
SHA-256: e8fd3bb7edfc993aef0eee20647354a59646b2bc00349a1d25188d967c944987
font_01_sfnt_off000143b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B8 12392 bytes
SHA-256: eaff636b7fb4acd51cb4ef1a63de1a19068e39db3fe2e4da4eabe68eeae7e045

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