Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a666fdb516f39cf…

MALICIOUS

PDF

68.3 KB Created: 2020-11-17 06:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6680c63fab3cb7cfefe7e2884b9b3c2a SHA-1: eb9c7e376fc959b6b1dbb505b2d9506cdd1860cf SHA-256: 3a666fdb516f39cf993e9c874f6b4353624ac8995fa71f0a6cc2473eb6767056
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading a service manual, which likely leads to a malicious payload. The PDF structure and the presence of an external URI strongly suggest an exploitation attempt.

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://traffnew.ru/strik?utm_term=bmw+3+series+e46+service+manual+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481064/normal_5fabf7d8b5e46.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1742738.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/tapalisizemef.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.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/tenunud/kazelidizi.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/suwavipuwifizipo.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/85020518215.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/61123791249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5ca875-3756-4adb-ab06-b41d2faf5dde/super_mario_flash_3_unblocked_nes.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/three_types_of_rocks_worksheet.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_off0000c0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C3 5692 bytes
SHA-256: 9ad46ab2d692c900a14f2b83194349a53ba87079f1c61873261973bd9b0c9e54
font_01_sfnt_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 14780 bytes
SHA-256: 1dd8adc16662e84e1469dfe09d17998f1000b90299c174ce817ec09f00c9479c

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