Malicious PDF — malware analysis report

Static analysis result for SHA-256 8654b6fe72e6ff91…

MALICIOUS

PDF

238.0 KB Created: 2020-11-22 14:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 932630198449b376743f4e9656795eb9 SHA-1: 10d1525a25529fd88b55e52dc19f48ea867fa622 SHA-256: 8654b6fe72e6ff915138b8537f496b58075605d67f2a661ea37f56ffe11c0921
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading further malicious content or visiting a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://traffset.ru/123?utm_term=core+java+cheat+sheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f98fac1eb66d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f87e7d845840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5fa8589ea6023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5f97dd4aeec8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_5faf3c6e9d9db.pdfIn PDF document text
    • https://vegirizixe.weebly.com/uploads/1/3/4/7/134716682/bokozav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5f9370f594372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f94d0d7550d0.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/4fcf7b50e.pdfIn PDF document text
    • https://cheatography.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9aa791-a3d8-4e4a-b021-d84ee14c578e/penn_jillette_god_no.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b66288-1269-4821-a5f7-2c6429a0e4fb/84164976872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec4527d-26a3-4dba-bac9-2e8b6712f405/71419633467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea147f5-7d0d-4923-a090-539b81e61b58/famiwisigubezatofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d99212a-7768-4fe4-bcc5-0ada1e88acac/lixirazomutife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2cfc40-9d2c-458c-b7d1-032ea2c05966/38655577818.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_off00035ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FF0 5252 bytes
SHA-256: 355c323735b61544aece81e4a8184590e91b03defb44f8047d70cdd50e08f19f
font_01_sfnt_off000371d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x371D0 18272 bytes
SHA-256: 9b9bb8db0dc3a8ac914ac5d507c1b70a57463098e1aec02585b85a0339693729

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