Malicious PDF — malware analysis report

Static analysis result for SHA-256 71fd13298988e572…

MALICIOUS

PDF

67.9 KB Created: 2020-11-10 06:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c976e1ccad0ecd75193b33d087ed9427 SHA-1: b7d59e271326f4e8479f7dfa1078a528d4e6760d SHA-256: 71fd13298988e572fb409d23fa71710e79bffb781fe9d0430722023a54776734
96 Risk Score

Malware Insights

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

The PDF file 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 heuristic suggest an attempt to redirect the user to a malicious site, potentially disguised as a game-related search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?keyword=castaway+game+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403406/normal_5f91f945d77eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_5fa6e1f4bce53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5f8cfe0db1413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f959327126b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f8a1fdfba99e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454055/normal_5fa2cbda26db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f9124a02ca27.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/nuxepiduded/polaris_atv_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nominal_relative_clause.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/jokidajitidab.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/satelec_dental_ultrasonic_scaler.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/55028534669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/435abb95-39a6-4576-87e6-7b3205279e3a/bimotiw.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_off0000cbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF9 5468 bytes
SHA-256: e5ea50535d22937ca2b10fcfc7db26166e64177b09b144c6728f9c49e05a4798
font_01_sfnt_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 10812 bytes
SHA-256: 6367362fd2d98abd84340168c067bee9a30c3a7ff59c85dc52696d4b99817004