Malicious PDF — malware analysis report

Static analysis result for SHA-256 578b4236cd20b525…

MALICIOUS

PDF

72.4 KB Created: 2021-01-08 02:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c1d630b2de6a4abfa1dea07aec192993 SHA-1: b4d55e165631a68a86b0b06b04846d95d2e6c900 SHA-256: 578b4236cd20b52552c8885bfe557c7413f6de24f0fb76f52537efe0aa488b44
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and the ClamAV detection indicates it is a phishing trojan. The embedded URL is likely intended to redirect the user to a malicious site for further exploitation. No scripts were extracted from this sample, but the overall structure and URL suggest a phishing attempt.

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
  • 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://trafffe.ru/123?utm_term=diamondback+century+1+road+bike PDF link annotation
    • https://cdn.sqhk.co/vekuperik/49p5DH3/mavilijed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f8d43c254eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_5f9f3100c2dfc.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/mexesazaxasa/vscode_code_formatter_php.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845a3a5c-3abf-466f-8c28-65c442c9a491/zulikejok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f8f103-f239-4b21-909f-c79fee939316/92448220264.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/19759781097.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/android_action_bar_color_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511f13b2-67f0-4cad-b3bf-75059a686b94/97841850377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7519bcb-0ffe-4403-883f-d1f4b8275d37/wayfarer_class_medium_freighter.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/cavatina_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/43076006359.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB04 5232 bytes
SHA-256: 19d73787d3b10e78efa6b811490224dc806401e4d0074e2b298ff572d3893849
font_01_sfnt_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 10332 bytes
SHA-256: 5460dd4eea42e48225f1575d58c4264ad0e4345ccf2abcbcd7bc2577f273feb3
font_02_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 16028 bytes
SHA-256: ced8b21f0c91c47eb2a8e10a251844195ecd6fd413d2ce9a64032c85f057f195

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