Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f41291825fa126b…

MALICIOUS

PDF

89.1 KB Created: 2020-12-21 19:55:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7e864df33e8069f9220ef2b8d5e6d7f8 SHA-1: 230cc187c6d14ef8007d207cec34164384cab662 SHA-256: 2f41291825fa126b1f8a1543d0336cc260ec60b5d17a31a0a28546e1015cf811
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://cctraff.ru/aws?utm_term=new+anticoagulants+pdf'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this PDF, suggesting it's a phishing or trojan delivery mechanism.

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://cctraff.ru/aws?utm_term=new+anticoagulants+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f8bd7526d9f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5fbf3a478297a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_5fb39b7310e8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476302/normal_5fad5e3a4b60f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474734/normal_5fc80dafd4bfb.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/3229afbc-52b1-406c-bce8-c50b4fc5b0f0/93487417472.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/edred_thorsson.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf372fa04221c71e5febb/1606284146992/35198834456.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12744239b07229132d4f5/t/5fc5c7da61e25426e1005db7/1606797279136/30279343722.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/xufimose.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/happy_new_year_song_pagalworld._io.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/bioteknologi_konvensional.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/notuxaxologitavijobise.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_off00011c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3B 5288 bytes
SHA-256: 2d84381ffeb728d38be9e1e7f7f4926917c90fac006c98fde2fd5a65d4db9aa9
font_01_sfnt_off00012e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E69 12476 bytes
SHA-256: 1b074d3c1509aef2799b8852ed6a416dd226ac11b6f56dc03f82674fb45a28ee

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