Malicious PDF — malware analysis report

Static analysis result for SHA-256 95212db7a80b3077…

MALICIOUS

PDF

69.0 KB Created: 2020-12-23 21:35:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d6721eba08334598f25c527f93e8c7c7 SHA-1: 36c69638b33931c2cba4cbcc7595d8e810a358a9 SHA-256: 95212db7a80b30772e5b3c7f6599e5a474b7da7f81ce7184863d1645f1d8cdfc
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/strik?utm_term=cookies+vs+claus+game+free'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to redirect the user to a phishing or malware distribution site, likely disguised as a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=cookies+vs+claus+game+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5fa343cb4cb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5fa202e89feda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f926df37f70e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_5f97de67baa2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f89df2163a6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fb7434522679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5f99e5532bd0b.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/kotenu/71427595340.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/mugesuvikajoxepopowepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78f44ea-36c8-4697-964b-a93b26a34fd1/39214655396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310dfa51-f469-483d-baf7-8be93ad371c6/wuboboxunuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/xamowuzatufesepiroj.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/85410501825.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/lirik_bowo_caping_gunung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955ee2cb-2fb4-4b22-b7ff-29c89d1267c2/57902124753.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_off0000d477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD477 5228 bytes
SHA-256: d45f566dd33f85198280c508b9cd442e49633f45c392fa47c0fb120fc4693607
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 9804 bytes
SHA-256: c0b586846c41b10bb49394f58b4b7d451098ca426392d22d6627037a04f0843a

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