Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ae0e61ef9e2c73…

MALICIOUS

PDF

68.9 KB Created: 2021-01-16 03:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 711e6e8dcb862a8464dccd630a66de7d SHA-1: 769dcff115a5306d5f0cf942662b18c8fcec46cc SHA-256: 05ae0e61ef9e2c735801af839578499f825b133cae3f85acbaa6bd4774da85c9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'trafffe.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, potentially masking the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=gold+cross+chain+amazon PDF link annotation
    • https://cdn.sqhk.co/xobupuwulawe/hhhfhd3/formula_1_2019_ps4_car_setup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450884/normal_5fe8b4b286b5f.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/dTbggid/55781458205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f91f210cb90a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454547/normal_5fa8be3cc9562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_5f99947f096cc.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/foolproof_module_7_test_answers_quizlet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483851/normal_5fcd37337a820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5fc35f86a9300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5fe3bd3b13cdb.pdfIn PDF document text
    • https://site-1172011.mozfiles.com/files/1172011/fezezukubarujotipogoz.pdfIn PDF document text
    • https://site-1167950.mozfiles.com/files/1167950/31928026303.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/6ibhczd/pretty_brave_xo_trainer_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/iggcqhj/acdsee_photo_studio_professional_2020_manual.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/divikufifir/sea_of_thieves_fishing_bait_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/2327747665.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_off0000cffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFD 5260 bytes
SHA-256: a5c4d7d47cd1f1fc5615d114be7a73f6e12d34a2af656ea1e3924050facc180b
font_01_sfnt_off0000e1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 11016 bytes
SHA-256: 544cfc7e980629fde49821d6ee284320b8b4417cc4b2eec88d99e75a0d338d6b

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