Malicious PDF — malware analysis report

Static analysis result for SHA-256 148a846deec72255…

MALICIOUS

PDF

72.1 KB Created: 2020-12-28 07:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de7f39b6c5f62a20033faa39546a218d SHA-1: edc12c218db509d513cf5416ee84a5c2965e4313 SHA-256: 148a846deec72255e08c28f72dd37b030adb66a6c205ac117c9bab91eab39b08
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=fernando+fernandez+facebook', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=fernando+fernandez+facebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5fdbc139aa474.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/eu8hfig/jukabasat.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/haHjfKY/snakes_and_ladders_online_3_players.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_5fc9fa44d41fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_5fe963e90eb48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401558/normal_5fcaf38a577b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5fe3e43c3dd47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402712/normal_5fe19c3fe23db.pdfIn PDF document text
    • https://fexejazawipezes.weebly.com/uploads/1/3/4/8/134869354/nudejitowoxef.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/liguwubore/real_estate_investment_partnership_business_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/perfect_viewer_cbr_reader_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec39b7ff-d459-4652-a778-5662c03c1ebf/95221944350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc715fa3-415f-43d8-9a78-bcfbcbf87364/balancing_chemical_equations_worksheet_middle_school.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_off0000d173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 4676 bytes
SHA-256: a73b4e4072bb4ec1569d7f55086b687d03548bb5c3fc70122133867190f2ae85
font_01_sfnt_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 10940 bytes
SHA-256: cbd00bb233606ccfeaa084258a29c6134ff91813c37773d10eb15823d20e4d36
font_02_sfnt_off0001052b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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