Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce02c5b77121c5af…

MALICIOUS

PDF

127.3 KB Created: 2021-01-26 08:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c9ab8b38edaa912f68aca7dfa5d32036 SHA-1: b2c55c00a499f3794d45b81ae366a8a2d2b32055 SHA-256: ce02c5b77121c5afa8ab29ec72627e99f946ebc79c1124d5b5b9509faa559104
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=kill+la+kill+nonon+fight PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379723/normal_5fca330435d6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fe43f7bdc839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5ff281ecbf2ac.pdfIn PDF document text
    • http://idealica-uficiale.website/play_tube_video_tube_apk_uptodownn7bp6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5ffbffa7c2c45.pdfIn PDF document text
    • http://czecheducation.space/domino_s_delivery_pizzahyewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_600be37e5ea50.pdfIn PDF document text
    • http://creditactive.info/87001728822kh9a4.pdfIn PDF document text
    • http://phrensy.co/83637512647rm3db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453098/normal_5feee523200c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fd9faf4803b1.pdfIn PDF document text
    • http://help-business-media.com/school_bus_demolition_derby4f7lg.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://s3.amazonaws.com/nokiva/apache_file_instead_of_display.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/pogil_lattice_energy_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/kabovilixeg.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/marine_traffic_apk_latest.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDE 40604 bytes
SHA-256: 1f4d159fb0c8c25b8fdbc73a5b038434a4c1e8b1bfab39bead79edfb31da453e
font_01_sfnt_off0001ac4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC4E 4456 bytes
SHA-256: 929bbf7d1f2c7dbacdcfe6faa7893ef50ccd69e0c344312c4ec4b20063183044
font_02_sfnt_off0001bb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB5E 11432 bytes
SHA-256: b8dd1daacb989322a3af63cf9e132e00b036c74e0594685d8ea89a979c99c383
font_03_sfnt_off0001e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E165 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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