Malicious PDF — malware analysis report

Static analysis result for SHA-256 186e9589cf5e6d89…

MALICIOUS

PDF

71.1 KB Created: 2020-12-16 14:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f0afec012b20b768b0da45ad0be714e0 SHA-1: 00e49825db5591349136e9542fe4c7ed18305335 SHA-256: 186e9589cf5e6d89c6f254ee565db23d616bc01c7f11ff25c7257df7c273fc2b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. The primary malicious URL identified is https://traffmen.ru/123?utm_term=simpsons+tapped+out+upcoming+events, which is likely used to redirect users to further malicious content or phishing sites. The presence of numerous links suggests an attempt to manipulate search engine results or distribute malware through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=simpsons+tapped+out+upcoming+events In PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/5012c6ca.pdfIn PDF document text
    • https://pobafegesodagiz.weebly.com/uploads/1/3/4/3/134305133/zuven.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/butov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fbecda821128.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/fuwawibu/piweziwuxakotupafepe.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/pokemon_soulsilver_kanto_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/75574508852.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/54689025796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ce80c0-55f7-4745-a2f1-171c7619293d/fepagelogukawopugole.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59cd3bd14ff0dd2bcaadb/t/5fc93e90a997b325590b744a/1607024273147/57974791018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58d04cd1e280355f3c276/t/5fc7931793ad1a48122028f4/1606914840704/army_toys_town_mod_menu.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_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 5428 bytes
SHA-256: d8d0c47d759d1094ef15402effeb47c3529cf2819587d0073606b51588eebb68
font_01_sfnt_off0000ebce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCE 10600 bytes
SHA-256: 97abe1ffc0ba3dce18d45bf30d319e6e990206cdba3ede2c503d292a2c2642d8

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