Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6a999260de3b5a…

MALICIOUS

PDF

70.7 KB Created: 2020-11-14 10:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 279a9a66599b6d20bc4e41fd9a6e8725 SHA-1: 1d3b7f8b3ff320464cc9d1e3f9143fcfb1133826 SHA-256: ce6a999260de3b5a3cf3da977f26560c66c42c3110e89650b5c16cfe49cff788
104 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to a '2014 buick encore user manual', which serves as a lure. An embedded URI points to 'traffnew.ru', a known malicious domain, likely serving as a download source for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=2014+buick+encore+user+manual
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f8d3c3398257.pdf
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/2019034.pdf
    • https://cdn-cms.f-static.net/uploads/4427105/normal_5f9c52992c96f.pdf
    • https://wikamarelifegef.weebly.com/uploads/1/3/4/3/134380256/2480959.pdf
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f873e2377a5f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zidosozawok/funny_memes_pictures.pdf
    • https://s3.amazonaws.com/felasorarabipis/22831358181.pdf
    • https://s3.amazonaws.com/kizuporowefib/acc_2020_chicago_abstract.pdf
    • https://s3.amazonaws.com/jedaxopopuko/audience_analysis_in_presentation.pdf
    • https://s3.amazonaws.com/povelenavuviw/tedefopuxukuwawomowazu.pdf
    • https://s3.amazonaws.com/numegubowalonan/teacher_college_running_records.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cacc.bin
9b7f0105cd0bdb43c1d8c4a2a429116108e2a31f22fcc38587230014cb7677e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCACC 5268 bytes
font_01_sfnt_off0000dc8c.bin
a050f88622d30d8362944d9963b487b81523f329ef692a8a6d6ce5e0e06739d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 10432 bytes
font_02_sfnt_off00010005.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 4324 bytes

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