Malicious PDF — malware analysis report

Static analysis result for SHA-256 63198d5c83d12370…

MALICIOUS

PDF

67.7 KB Created: 2020-12-19 11:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a1af3040363d53b8d365ce0a4823f33b SHA-1: 7b208f69d22eb8fd320e5641313653ddb6936aa9 SHA-256: 63198d5c83d1237029e75cb611f5c44389b6d8cb8e62440c23aa3b8e1937ccd6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffnew.ru', which is likely a malicious domain used for distributing malware or phishing content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a game mod, suggesting a lure to trick users into downloading further malicious payloads.

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://traffnew.ru/aws?utm_term=bloons+td+battles+mod+apk+android+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5faad29c7abe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_5fda1824a9800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_5faeed21b32ce.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/xujitezu/admin_template_bootstrap_4_angular_8.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3a708845d09244f8a17/1606284200493/le_van_thanh_scs.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/32412012086.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/81880909602.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/learners_permit_florida_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe06f4bc819f1cf49f7a66/1606289141238/unix_shell_scripting_by_yashwant_kanetkar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb0864a3cc4058a48184/1606220552947/mega_man_3_passwords_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/basic_elements_of_communication_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34cee93-27af-4a99-be2f-c7aa05d523c1/54492053576.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_off0000cb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 5412 bytes
SHA-256: 92ac4f36383b1c3a4fcb94b2950745524351574b37088172499d846fa3ba8309
font_01_sfnt_off0000dde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE2 10648 bytes
SHA-256: 981564b7f892c4462741634efeeb815750e224fc1431b647906dd7fc749759e4

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