Malicious PDF — malware analysis report

Static analysis result for SHA-256 9529d1113e66b7d9…

MALICIOUS

PDF

70.0 KB Created: 2020-11-13 15:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6afd0e0c08126106ae7f79af1425bdcd SHA-1: 2704a02dfc56417e02d1997b7de70236a857147b SHA-256: 9529d1113e66b7d97c132cb5edb8bc4bd298c4eb17679f0c5f119d44dbdd7113
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query for a popular movie. This strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=castle+in+the+sky+full+movie+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fa4afe5b7a75.pdfIn PDF document text
    • https://gitijekukojijot.weebly.com/uploads/1/3/4/6/134626905/8242710.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/nifexumiritat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f8f18c38560c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f874bdcf0986.pdfIn PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/4004344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5fa79857883d2.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/8672900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450501/normal_5fa6cf3c53322.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/jivumulexuku-woruzamo-zopinegel.pdfIn 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/c7fa67ef-56a9-4d61-9a7e-4468c892e3af/mipabatil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EE 7292 bytes
SHA-256: 4b049cfdfd476d5a6c55d4a6db7b43dc676317ff46de08b02e0e485f27b6e977
font_01_sfnt_off0000d1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CE 5180 bytes
SHA-256: 693ef9f8b5b4648bfae8dbbcc6ce5f7d1a18c21f90be44483b4b7016e495f33a
font_02_sfnt_off0000e357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE357 11076 bytes
SHA-256: 66c65018c93c85f390ccb5d798a45c7e264048225da7825f7ca54f5a9feea2ad

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