Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17c64a4798dbd4c…

MALICIOUS

PDF

72.0 KB Created: 2020-12-18 13:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b489b1a3be9ec9c158f84ca5a1e9d935 SHA-1: bffabf580e9c5e4f14cb3b4b18bc5c2a83af49c5 SHA-256: f17c64a4798dbd4c009f939760f15ba9309bb84cc43c9aa2a49a80b7161bc8ac
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 or trojan variant. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically, and the presence of the URL indicates a phishing or redirection 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://trafftec.ru/strik?utm_term=7+of+pentacles+zodiac+sign PDF link annotation
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/gekojagegelusewezil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5fb287bfac5ec.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/844aa076.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/porafuxebulab-vetiwamuxunew-ludivete-zosadevozinijib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f8d114d6d987.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/zanerekemagapodakez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9546a56f-39d3-4157-aa6d-877a7b3f91f0/geometry_trig_review_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b5908b9e860b7b22bd08/t/5fd0784d8f1ddd5ccbddc110/1607497806445/55483278623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09e835d-e1dc-438b-bbe6-dcd9915c6b38/how_do_you_spell_immediately_correctly.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc260d518e72e5fdb24a889/1606574296301/close_up_pics_game_answers.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_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 5260 bytes
SHA-256: 1a8e5f6b21ed724c85160612a68ce03967c21da5bf4b49d9d7fa5e037614ef2f
font_01_sfnt_off0000eeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 10824 bytes
SHA-256: 2cb3d13b4eb69ca27bdaff16b3a1f491f5040b90a4e0d8b04940bf01675bb967