Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcde018dd317639…

MALICIOUS

PDF

64.8 KB Created: 2020-11-11 16:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b9753ec5fb11f7e3e234aacf515c40b9 SHA-1: 170602a982dcdbf16bd63bf37710c5c3c2598503 SHA-256: ffcde018dd31763912b9660dada4167a15cb750b0b100c7a27619bcfa65ae162
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 as information about university graduate programs. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=western+new+england+university+graduate+programs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f9f02d4ee5db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_5fa1418941c7e.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/raminixada_bakonovagojed.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fuxepuga.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/66d3b57453f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5f8dc0445ca62.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/safago/dejogaxiru.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/chevy_manual_holder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228df072-0d67-4860-918c-b648ef2a34e1/what_eats_volvox_algae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398be799-d358-4119-b283-de3bb7e716ed/iso_to_pbp_converter_online.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_off0000bfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA2 5544 bytes
SHA-256: 76e49c0486d26efc131860e38a99294eb1b46ad00f1a54789372be63da322ad3
font_01_sfnt_off0000d28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28C 10508 bytes
SHA-256: f1bd8519ca5db129877567ae7a6aa9f50214835afade8d1814b3735d4d7f9364