Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6dfbd9db795106…

MALICIOUS

PDF

65.7 KB Created: 2020-11-25 01:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6fc7d1e34a64149a4bb6cac6152d3951 SHA-1: 014092aa2f3733a84a47936d31eb6c1ad418c414 SHA-256: 3d6dfbd9db7951061b9a58e6325b8bcff244ca619afed254b60c80eb8c3fcda6
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, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The presence of embedded URLs and the overall detection score suggest this PDF is designed to exploit users through social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=portage+middle+school+sports PDF link annotation
    • https://xelabuxu.weebly.com/uploads/1/3/4/2/134235382/bab1751f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5fad6ac8c8035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_5fad425a2382c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5fba213f0dfa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8a87e97af0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f8db395abdba.pdfIn PDF document text
    • https://dokipodaj.weebly.com/uploads/1/3/4/3/134306773/sewelaxonopexir_pukizuzumofo_wukilezevudof_pirizenadibujux.pdfIn PDF document text
    • https://ronukava.weebly.com/uploads/1/3/4/8/134885886/tukorabawaxubak.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/fulazelof/roblox_rap_id_codes_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a1b624-6a13-4ad0-9d5c-efcee17abb97/97033095732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8869d8f3-5d48-44fb-86fc-e5ad16e7af1e/ropodosonatowezisuzol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac43e53-fc6f-444f-9e71-46209f55642f/ditajamimutibirewupoju.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_off0000c6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 5488 bytes
SHA-256: ff66dd509ba70fa39104bff6b55294d4beeecd77f80f6c82783041a80975cc9d
font_01_sfnt_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 9760 bytes
SHA-256: 9c2cc8865f41e26834135999e1dccd43d6e71cc63d9b3a7662018149c7b493ff