Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be73dcf845d5e3c…

MALICIOUS

PDF

66.7 KB Created: 2020-12-15 03:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: db802b6139f259dcd07b202ab689493e SHA-1: ef9a86778cf46633c087aa1e57d59c38d184b09f SHA-256: 1be73dcf845d5e3c5a154d7100cdfffd1a4b0765db2b62415654ed9616a6cdad
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'edawg878 texture pack' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=edawg878+texture+pack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f90a42dd2665.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/palevijuj/vba_paste_array_in_excel_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19a8f40f1034a5caddecf/t/5fcf5baf509e863c682efc3a/1607424943642/36063497713.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/canon_pixma_mx922_manual_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/disney_u_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/45668729712.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe08e59ee0f32b871ac1ba/1606289637660/millionaire_teacher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c266a6c5-e3e4-4986-800e-e187f53858a3/76_80_88_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/mizufazi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/xawusutukezojifaxuzopati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752402b7-dcb5-45cf-b787-e8f883f63d6e/david_harvey_the_condition_of_postmodernity.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB022 5484 bytes
SHA-256: 75afc2ff92b7dff0d451e41b465f728476157eea316c0e5ca66e27f41470fae6
font_01_sfnt_off0000c301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC301 10708 bytes
SHA-256: 52a7686a157897ac301acc6b38df2bd88efa5215e932aef2ef48b57ac2593fa1
font_02_sfnt_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 16064 bytes
SHA-256: b2cf57f29eb3b5e0c174876c58b70ef8fadd81916e6e05a17acc225f9629e7e7

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