Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d1f9152d43161f…

MALICIOUS

PDF

71.0 KB Created: 2021-01-01 09:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b0a954cc8e2cef8ef43668282114052c SHA-1: 294558b5c668627d40e060b3bbd18d217ac081bd SHA-256: a7d1f9152d43161fda3f1557de461cb8374367c8bb95528865748752f579086f
154 Risk Score

Malware Insights

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

This PDF file contains a malicious redirector link disguised as information about a live stream debate. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL likely leads to a phishing or malware distribution site, attempting to trick the user into clicking through.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=live+stream+presidential+debate+tonight+msnbc In PDF document text
    • https://cdn.sqhk.co/sarowojep/ghaHjgE/83121226086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_5fdb0525cfcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5fb9f355dcb7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5fb2c2a4209c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_5fb27828e277e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8e897a7c56e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5fafa26d0c7e8.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/sirasu/21530199796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59cc195a-043f-469f-8c01-a8aca832d392/dezopuzolorelukebaza.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/milady_barber_book_workbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df96025-c5dd-4be0-bb52-ac545274fbf6/91191313439.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_off0000d7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C6 5628 bytes
SHA-256: c1bab92fd90b22723d283085b916db25a5c18a9b8287447f830bb46040fd29a1
font_01_sfnt_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 10640 bytes
SHA-256: 7e80d023c41ebefdca148b7300d79abea5af9303166a85a316808010c2c7aacf