Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ee72e5d5c58391…

MALICIOUS

PDF

67.4 KB Created: 2020-11-23 11:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ade34b49e7fe066ec289e046d0e10ca7 SHA-1: daa6180cf75ad2d90bb2ffed86f997a32c19e209 SHA-256: d7ee72e5d5c58391d84b432c033bb003b54a5065617adf9ad3abbdf09a36cefe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=bioshock+infinite+new+game+plus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_5fa59d76c68d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5fb4d0ffb5d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5fb2a28a69196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5f9f88a64a616.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/tamobalasu/datimo.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/68417515638.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/30557124694.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/symmetric_and_asymmetric_key_cryptography.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/i_have_a_dream_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/picsart_sunglasses_png_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/australian_army_cadet_uniform_badge_placement.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_off0000c8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CA 5536 bytes
SHA-256: 5cd6b0d60fcd20b051825010f39c455a5d6ffaf3ae490926f8235e3acffcd898
font_01_sfnt_off0000db9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9E 10932 bytes
SHA-256: cd118be7af1fa88a4b9106b263194e0669dedf9bb9da74d5e06b6eb992dc647c

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