Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3e5bb9169d5bbd…

MALICIOUS

PDF

100.4 KB Created: 2020-11-11 06:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 662938d3f98beef1d3ecf3c609d2adfd SHA-1: d9ddf16bcf902ee4d637b4dd372494f70425784c SHA-256: cf3e5bb9169d5bbd4e8f8ede16edc64649735c8d1043463f0dcdd2173e6b78eb
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. The document body, though heavily obfuscated, contains text fragments related to "10 point pitch rules" and the authoring application, suggesting a lure to disguise the malicious URL.

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://traffnew.ru/aws?keyword=10+point+pitch+rules PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450890/normal_5fa2bfcd9481d.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/03335282-1ef6-4736-b337-03ac7185f7f3/jozafufifixapozawiriweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea1e99e-a6e3-4bf3-bdf6-abb65e447a62/morrowind_coc_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/user_manual_for_dynex_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfcb6430-d481-4932-b915-3805946861b1/22698076422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9950abe2-1b4b-4f41-a213-c837f6fa7c0a/59475120753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c9e84d-3b0e-4848-a4c9-dd9e4e74775e/21771490227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216f93d0-daf3-4892-a1a0-2dc4556f4cd4/97290723142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e288768-6c48-498c-b1d5-fc8108717c1c/41292789135.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/98555155962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4243b7-cd84-443d-ad2f-3370f52e0255/lejupuxibazugefufe.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_off00014d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D5E 4908 bytes
SHA-256: 003f3cb755b9519c91a675c3ff5da8f2776925e467a349f16bf8478dd5ad0fa8
font_01_sfnt_off00015e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0E 11312 bytes
SHA-256: 38be82e7bb129aca80343c2a280080548c20c5667b525414dbe73b485fe7f0c0