Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbda8adb55951aaf…

MALICIOUS

PDF

76.3 KB Created: 2021-02-26 12:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4f2ac34c54ab063d2afaad324d200a10 SHA-1: 82baab337cbcea818b85f4628a1aaf604e51636d SHA-256: bbda8adb55951aaf7e34ac8b12338e2501ff1279531139779d2e94deeae35cdd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users by presenting a seemingly innocuous topic to drive them to a malicious site.

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://bologen.ru/strik?utm_term=painting+kitchen+cabinets+white PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5fc66e1cafe62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474446/normal_6005db0a1d6f4.pdfIn PDF document text
    • https://keguvetazako.weebly.com/uploads/1/3/4/7/134702613/8733411.pdfIn PDF document text
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/punupuzemelixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_6038c9ad03398.pdfIn PDF document text
    • http://zafogititug.22web.org/gakimivekevobadifov.pdfIn PDF document text
    • https://dejalujufoleto.weebly.com/uploads/1/3/1/3/131378776/1016497.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/6245556.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvofaga.rf.gd/53855456693.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/40383054563.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/redmi_airdots_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/pekuvabi.pdfIn PDF document text
    • http://wojobawezelo.rf.gd/15408790290.pdfIn PDF document text
    • http://verepuremi.rf.gd/kakan.pdfIn PDF document text
    • http://relimimukavewuj.rf.gd/web_template_html_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/the_knight_in_rusty_armor_audiobook.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5232 bytes
SHA-256: aff2c389915c24dd975bb0cec49c92e5e652378680c9f4a20f03131391746662
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 11792 bytes
SHA-256: 11a59a4d205507b031fe572abb1cf2dec0b8d48f7122890169d07bea3f3048db

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