Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45c4497c723679b…

MALICIOUS

PDF

74.6 KB Created: 2020-11-13 11:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 374f041c1bb4c2508a965624e15dcc47 SHA-1: 18ae773939716a5481f1fcc981c4cc6a6b92b205 SHA-256: c45c4497c723679ba1233fc59d9704341eed32833b97ce8e2e00cc89d00a0995
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 URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'data vault modeling', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=data+vault+modeling PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5faa49514ad53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f9b5dfb3964b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f97cd78f2c93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5f95495ecbd39.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/suzeduselu/farmall_a_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/advantage_carpet_cleaning_el_paso_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/ireport_5._1._0_not_opening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52423dd1-fc75-4072-b5e2-b846d2ac7a47/pafowowixakitoxima.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/acidosis_metabolica_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/roblox_level_6_executor_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/soxileponosegiguv.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/q_in_cursive_font.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/89135838775.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/batabeguloxoxugaxupixida.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/opposite_of_always_free.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_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 4932 bytes
SHA-256: fdabc1c160bca17028f78edb4173b0a11da17a4e2e6ba23ccf2ddf2449476e54
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 9736 bytes
SHA-256: e8691396acd17ddf223d7c32ca4bf4bfb1d1ba229671bbcd4bfc628a937079b2

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