Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7d933d947b147b…

MALICIOUS

PDF

68.4 KB Created: 2020-12-16 14:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 33cf05c057edc88a1cd00e150e98f2cf SHA-1: 9f26f69e6eec6d129f7bb436b00e34eb2cbe35a9 SHA-256: 2f7d933d947b147b1e411e82ec07e977add48cc7612b26324aa1ad6be08c7c3f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to "quotes about laughter" and the wkhtmltopdf tool, suggesting a lure to disguise the malicious URL.

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://traffnew.ru/123?utm_term=quotes+about+laughter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407756/normal_5fc495ff4e08d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491412/normal_5fd6b1dd8ecc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f96a0e5c8ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_5fbee462cb003.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/liwara/47558706114.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/moto_x3m_winter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638c042b-ddbd-4a82-a6d9-06ddec0a2b52/gadexorifebikitajaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80dbc82-3ade-4fa2-aa26-68148592eedd/fantasia_2020_lineup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66eee3a-8df7-4926-870d-6a4cabef5b9e/game_show_gauntlet_answers_fallout_shelter.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/aprilaire_5000_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c97ba50-3afc-4c08-b64f-57a59da2b1b6/4369768421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a0d0ce-8ed2-4ef8-9843-8dca6c6b8607/42395226160.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/knight_of_swords_reversed_as_feelings.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_off0000d0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 5148 bytes
SHA-256: 4035f7aa85967f1f2fe65c8b5bf239cdb284e07253ec449204c2fcc1e2d8f3a3
font_01_sfnt_off0000e232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE232 10228 bytes
SHA-256: 80a2ac8ef9d13bda8f4d09e207a9d41185075f5100d745a6de17a0f290f562f9