Malicious PDF — malware analysis report

Static analysis result for SHA-256 476f9e181df49235…

MALICIOUS

PDF

66.5 KB Created: 2020-11-19 21:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 102371de0009547ad7e257073cff8450 SHA-1: 5e2a5d98221219aedc97c4c6a3a11fef5bd9c6f6 SHA-256: 476f9e181df49235b91bfc1cb85f034d8bdadd19a4b10c87d921a85528e6f0fa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=physiology+case+studies+in+pharmacy+pdf'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV detection further support the malicious nature of the file, classifying it as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=physiology+case+studies+in+pharmacy+pdf
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5f897b0230a5d.pdf
    • https://cdn-cms.f-static.net/uploads/4475716/normal_5faacecd19917.pdf
    • https://cdn-cms.f-static.net/uploads/4402720/normal_5f9377bf27c42.pdf
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8a83acd2a71.pdf
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f8d52d1d6f45.pdf
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5f9c32468ab28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gedimuta/pokemon_tower_defence_2_wikipedia.pdf
    • https://s3.amazonaws.com/rovotafavap/wegenarofidawatov.pdf
    • https://s3.amazonaws.com/mexavofezoxi/37716506557.pdf
    • https://s3.amazonaws.com/felasorarabipis/addition_worksheets_for_kinder.pdf
    • https://s3.amazonaws.com/zarelusipofox/share_cloud_apk_indir.pdf
    • https://s3.amazonaws.com/loxopudizus/ark_angel_book.pdf
    • https://uploads.strikinglycdn.com/files/9f0a1a23-f636-4ea7-b4e1-28eab9d331e5/6932474447.pdf
    • https://s3.amazonaws.com/wegugus/11828079581.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ad.bin
e7d1ccdcf6213233ad06d244577287bd95272416f2149ba8fb51b1955e86a1c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 5672 bytes
font_01_sfnt_off0000d9d8.bin
c13eb770f4b48868b4bcd7a2491cc646140144493d76cd22f3b480f89d3aaa66
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 10328 bytes