Malicious PDF — malware analysis report

Static analysis result for SHA-256 791cff68dfa9e656…

MALICIOUS

PDF

74.0 KB Created: 2020-12-14 22:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51b870d69589879a8458724fcf0aea21 SHA-1: d1e3d5413242e6f9efc7913ae89d8d43213ebeaf SHA-256: 791cff68dfa9e656da85fb100dd5afcbe38fceccf7d0930bd8cdcfc2ec3807ee
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'trafffi.ru', which is likely a phishing or malicious site. The PDF structure and embedded content suggest an attempt to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=gamp+5+guidelines+categories
    • https://cdn-cms.f-static.net/uploads/4458633/normal_5fd78b23e4fcb.pdf
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5fb41fa18a401.pdf
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/8c834265eb.pdf
    • https://tipiridevozono.weebly.com/uploads/1/3/4/3/134349557/rexipafufizop.pdf
    • https://cdn-cms.f-static.net/uploads/4377931/normal_5fa66904a6dd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0e701bda9c57a97be38be/t/5fc16d5de6d49a06bbc82b55/1606511966803/tevotav.pdf
    • https://s3.amazonaws.com/donake/64484869772.pdf
    • https://s3.amazonaws.com/firigugixujotov/a_short_guide_to_college_writing_download.pdf
    • https://s3.amazonaws.com/wikurixobelu/method_of_frobenius_and_the_indicial_equation.pdf
    • https://s3.amazonaws.com/lurutopobi/mimufov.pdf
    • https://s3.amazonaws.com/bisiku/54339702476.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceb2.bin
76e8008cbf50e92bf9ed74b5a57b0fbcdd7540cffc75d1f654d56018f61cae63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 5548 bytes
font_01_sfnt_off0000e182.bin
134e11e829055947368ba8c7e58419ab15ff5f5581fb48260d7e16729cdf8866		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE182 10788 bytes
font_02_sfnt_off0001066a.bin
23e5e0a6ad5360bf10628433507e5aab34c42d7d900ccb2a5214949f2168b422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 16112 bytes

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