Malicious PDF — malware analysis report

Static analysis result for SHA-256 d837467a545ca857…

MALICIOUS

PDF

73.8 KB Created: 2020-12-18 23:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9db8cbf067e936f3726f77a5f43ceaa5 SHA-1: 19898d3c381a1d7c47487bb36ffd20a524ea6558 SHA-256: d837467a545ca857ea239a08148dca73eee4e03da8949cae5cd1bb9e26d3f95d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain metadata related to 'riverbank pool hours', suggesting a social engineering lure.

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://traffine.ru/strik?utm_term=riverbank+pool+hours
    • https://static.s123-cdn-static.com/uploads/4422180/normal_5fc5570522a8a.pdf
    • https://cdn-cms.f-static.net/uploads/4471959/normal_5fa84b1f59446.pdf
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5fa9553a402b2.pdf
    • https://cdn-cms.f-static.net/uploads/4464532/normal_5fb99fc0153c4.pdf
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5f944da940412.pdf
    • https://cdn-cms.f-static.net/uploads/4407571/normal_5fb60bd3b1075.pdf
    • https://cdn-cms.f-static.net/uploads/4414164/normal_5fbc3bd4ce445.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf66900f7af3919d2fbd1/1606219373162/growth_of_the_thirteen_colonies_worksheet_answers.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf55f1e18c5c478ef2f794/1606374897799/sivapiwesuwuwibogojij.pdf
    • https://static1.squarespace.com/static/5fc51b05c14dfd36fe0cbc2a/t/5fd62278481cfa31adbfb97f/1607869051733/gastroenteritis_viral_rotavirus.pdf
    • https://s3.amazonaws.com/lezerawe/55364296331.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_off0000d4c7.bin
aa8b76215cde42636fce01a73157287ff0626f9390e7b5c836b6c0f534934de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C7 4980 bytes
font_01_sfnt_off0000e59b.bin
947aaebf3eb7739a0e2ca9341febeb8ea0a67c07628745f7fdcad7a1f638c388		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE59B 11288 bytes
font_02_sfnt_off00010c21.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C21 4324 bytes

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