Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfdaa80941ccaa0…

MALICIOUS

PDF

66.2 KB Created: 2020-12-19 17:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0a01cd555ea3ee8a1b0d2e601d6a1b49 SHA-1: da9af775d83acd16ca397a0a484144ceb8983b36 SHA-256: dcfdaa80941ccaa0dea5ce6c1b48ffc4750cee9405a30d0e1d91c772ed11616b
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=fundamentals+of+biochemistry+5th+edition+solutions+manual In PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/3af0492767d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fcdc71c5d603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f9c8ea7abefb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_5f9d3a74d8690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5fb6dbc2596b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5f938a982db0c.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/b38ee931-c906-4065-87f9-9434cdc5ecd1/miredurevimexokepuwuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8f9d31-5c30-46dd-b2c9-05b6ae1e94fa/xofuranogipil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c843614-ba13-49fa-aee2-5a22a44b4b7b/26054584896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3d47c6-7c74-4068-b03a-d4c35c8a8571/97785284288.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_off0000c28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28B 5584 bytes
SHA-256: 79e8fbd14286d38ae7d75b6fae17eaed8e83456577d5f1619ff99b3614ed466d
font_01_sfnt_off0000d566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD566 11536 bytes
SHA-256: c7a17538d2a46274adb97cd2d647c792bd77f61e7af482a789104de862795baa