Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c576fbaee30dad…

MALICIOUS

PDF

63.5 KB Created: 2020-12-05 08:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 60c59b153fa0146f3b8f9734e399afe4 SHA-1: 171d68948e9be8da023c724d54797ad88b689f2d SHA-256: d3c576fbaee30dad18bfa364f4b17ff2ceb2af807fbffb03b1f999c4637bd4cb
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution campaign. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a phishing attempt.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=bad+lip+reading+state+of+the+union PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8719bbdd346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_5fbdb8cd8b7c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5fad3834db670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_5f9f08e7a2b3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5f99c1251df18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5f8eec58a4f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5f987872e77ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6682185b-6914-4aeb-ae1c-6155220ce8c8/virapevovumozawanalifumul.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/95658403375.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2abe011f6a41984911435/t/5fc529943f75b1664379ed46/1606756762963/20344261861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7069b892-b08a-4618-be60-3013f383cf7f/traverse_city_west.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc23c37-b6e0-4212-9676-0212b3b53bd3/35948919122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc690042-cb3e-4993-8661-43dbfcc0105d/osrs_pure_guide_f2p.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3D 5236 bytes
SHA-256: f49fbf41930e4add09ecaec91b4dadb8ec6275dbd96a788c932c6ae7c8446e2e
font_01_sfnt_off0000c100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC100 10112 bytes
SHA-256: f2ca4f02312f8988290c6687cc8b396e409809159926558cf6f6c6a736bdc8d9
font_02_sfnt_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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