Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a1af6d4de1a6e3…

MALICIOUS

PDF

72.7 KB Created: 2020-12-18 14:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4d3bcb36f9cd368dd6f36ec8c4d94ace SHA-1: 75fdadd22508446c1d3e95ad2a20a3732137662e SHA-256: 98a1af6d4de1a6e3528af615ab3515c598c4b1615da690c0ee873255e4096dc5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'nuclear dissuasion', indicating a social engineering attempt to entice users to click the malicious link.

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/aws?utm_term=dissuasion+nucl%25C3%25A9aire+fran%25C3%25A7aise+reportage PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/uppsala_model_of_internationalisation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bf1b9955c744b53ac36d/t/5fc0e62abc819f1cf4f8dcdf/1606477355746/average_density_of_earth_in_kg_m3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5dc2688c99b6d37c954d5/t/5fd1804deeaf2774ac847afa/1607565391271/game_room_decorating_ideas_pinterest.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/pefovifugixunakepuneronot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e8ef2bbd740658068d75/t/5fc5d89b7acac6192a8ca6ca/1606801563970/a_theory_of_harmony_ernst_levy_espaol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54703c30a162e0c6f6b7a/t/5fd6d519dca221526053472d/1607914782885/agent_bhairava_songs_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/45-45-90_triangle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/63775389253.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/narepimejerutozidinu.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/kidigasef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc79b839866a15ab3def02/t/5fdc82fc3bd3a53b5e89380b/1608286972833/ice_breaker_trivia_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebdbc8618956c414e0ded/t/5fd020ea3364176a1250d762/1607475437158/hd_camera_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/57040802222.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd035e8cb11b25c09cd9c3/1606222687465/pacing_guide_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/23844522444.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_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 5508 bytes
SHA-256: f776a51a5bd58776d01ab9d34dcef9fbb35948c7d71b98935d2e42b712b19eef
font_01_sfnt_off0000ec82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC82 12468 bytes
SHA-256: 5933df4774dc0e335d0dc3de068b9b6c166886954add4740ade2574b3f3e3137

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