Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edb1c3de3ea2ec9…

MALICIOUS

PDF

65.9 KB Created: 2020-12-09 22:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 786496fc016337efbc5fd886083e55f7 SHA-1: b7dc4e579725ef89322d9352ab14fff68cfb705a SHA-256: 3edb1c3de3ea2ec9426c6de9c43aca04c2052b44a794c80ce1aa1ed6002aaa71
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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/aws?utm_term=bio+rad+cfx+manager++mac'. This URL is likely used to redirect the user to a phishing or malware download site. The ML classifier also flagged this PDF with a high probability of being malicious. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/aws?utm_term=bio+rad+cfx+manager++mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5f915845b5e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fa3dac0f25f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f9a4326e3a31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f8a26c24fdf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5f9b68b62734a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5f9b58f021607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_5fa5757f50529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_5fb9e86d4f266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5fbe5749b1fa4.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/wovigebi/50640632124.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b3e09955c744b55c34f9/t/5fcc84592bc7884852ae539f/1607238745595/fulcrum_racing_3_road_bike_wheels.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/interview_cv_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/zenumozigeturako.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/black_clover_fanart.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/magodukafotibumafigi.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_off0000c42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42B 5248 bytes
SHA-256: 75b540a1e772f71e10bc29c5470be7a4dfedb19537d56c843df9762ba1033e4f
font_01_sfnt_off0000d5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FC 11164 bytes
SHA-256: 442b7e3d5a07b522441d5338f10ccd6d27c1050a5c26cd28b88b5f5cb262b5bb

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