Malicious PDF — malware analysis report

Static analysis result for SHA-256 4291459a21eb3252…

MALICIOUS

PDF

65.5 KB Created: 2020-12-05 00:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfddd81fc5845568c65a8a7ddaad6ad0 SHA-1: deef472a505cadadd603512ce34876ba28eed7d0 SHA-256: 4291459a21eb325236ec6b5f25d8523d0cbe452e7572df983c85508a5ed12175
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 identified as a phishing trojan. It contains an embedded URL pointing to 'traffnew.ru', which is likely a phishing or malicious site. The PDF structure and embedded content suggest an attempt to trick the user into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/strik?utm_term=sierra+comfort+massage+table+headrest
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5fb39f2b7d63e.pdf
    • https://cdn-cms.f-static.net/uploads/4480589/normal_5fb29afdf0fba.pdf
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f9f55456d413.pdf
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5fc6af095cde3.pdf
    • https://cdn-cms.f-static.net/uploads/4488817/normal_5faeea6b7aab3.pdf
    • https://cdn-cms.f-static.net/uploads/4496001/normal_5faf736eb6b05.pdf
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f8a52aa22b67.pdf
    • https://static.s123-cdn-static.com/uploads/4379362/normal_5fc70fe6495f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muvemasoxaji/32441448468.pdf
    • https://s3.amazonaws.com/wozowuledij/farafamobegibejulelukube.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c15d.bin
e6b954c0361c29730bf1ec80e5e3d283b636d6cff082f6d0c89e7b95eb8335e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC15D 5676 bytes
font_01_sfnt_off0000d476.bin
def85cc50657ad76dbef043edf12dafc1efa44db26f715e085507921768da4c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 10348 bytes

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