Malicious PDF — malware analysis report

Static analysis result for SHA-256 2994d66fb2575cbe…

MALICIOUS

PDF

64.2 KB Created: 2020-11-26 08:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: af70e041d6db538fef8e5bd1b91ee297 SHA-1: 321acc1ea0574197d693f23fb77fa2f31781fdea SHA-256: 2994d66fb2575cbe137fe704ad63711219a6f405dc48de20f48f8b95a25a8bb6
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=agostino+and+associates'. This URL is likely used to redirect the user to a phishing page or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector suggests an attempt to compromise the user.

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/strik?utm_term=agostino+and+associates In PDF document text
    • https://cdn-cms.f-static.net/uploads/4491451/normal_5fb338f65b3ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_5f94dbe5881b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fb298493b032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f9e47931b620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f881e588e895.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/fumiposamisur/panoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae9ec90-cb88-41cd-b500-26fe9e3e4bda/map_exercise_the_unification_of_italy_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/segonugulawomikape.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/character_map_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/47370062097.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/83833841453.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_off0000be97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE97 4968 bytes
SHA-256: 5ac10f665744ed46a53eb2ba22bf75a0dd92ebac3e1b1b06433bc8db40c8d8c3
font_01_sfnt_off0000cf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 10972 bytes
SHA-256: 08269b1e24d4729fe57cfe21281efbfca76314621d3f1d09bc1aac6d9ea5e35b