Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1d80bd6a1c7ad5…

MALICIOUS

PDF

65.9 KB Created: 2020-12-19 23:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 07febd0951454cab963202b07dd34608 SHA-1: 230d4672ba7a33ac270a6a2b215c360d8a05ab5e SHA-256: ef1d80bd6a1c7ad5c2eafc72e1ee10966e06b2543d93cd53fd1fac114daec839
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffnew.ru', which is likely a malicious domain used for distributing malware. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it might be a generated document used as a lure.

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://traffnew.ru/strik?utm_term=minecraft+v1+14.0+2+apk+download PDF link annotation
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/sadapit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5fd73bdd7659f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468871/normal_5fc0cf32111c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f8bf8de1b6e1.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/vuxalirudidel/25340327130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61795839-bcf7-4d38-b602-f8a7bb1e2a47/explicit_formula_for_arithmetic_sequence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cf6301-f43b-4a41-87e2-90ac3795d774/achtung_die_kurve_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98567fec-1160-4edb-a9ed-a07d7042888e/26334035279.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/domefomuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e110b4-4b08-4fc2-91f9-a06fe966b3f5/fawaxakafonuwusumebepew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8112b1de-3cb8-4074-9525-bd012bae9335/4636591326.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c274a508b35dd5dc321/t/5fdcfa1a65c797038f8303d3/1608317468465/vifitekizowe.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_off0000b87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87E 5424 bytes
SHA-256: 1b5dc1c7a51763ea5869c2dd30bc7f7ecfba5197d746ea9a5ee3e7638834ff9f
font_01_sfnt_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 9896 bytes
SHA-256: f71b2294e2d652d6f73518fa8744a2d57e7a19ea15548a60ab3cc548e18cb9b5
font_02_sfnt_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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