Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbea352a401ca15…

MALICIOUS

PDF

64.0 KB Created: 2020-11-19 02:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3bafaffd6b982f7936861dda48e8d4fc SHA-1: d3fe1e1cad239032715dcc923624c547e1dc7b8b SHA-256: afbea352a401ca1533e3c82577edd8abef7a32adf88dc3597d031b309cf3490b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffmen.ru/strik?utm_term=concept+of+educational+management+pdf'. This URL is likely used to deliver a malicious payload or redirect the user to a phishing page. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL within the document body suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=concept+of+educational+management+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f8e384deb177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5fa0c4e2bede6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_5fa9e084d33e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f9e943b25a82.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/99ca0010c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8780193cbac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8b3021abec1.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/9cb3432e-e07c-41b3-a728-e0604b5802ce/xikaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b591f9-6d29-48e2-b112-556ae0d1867c/97621367290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe109a2-1f7a-41d2-b666-89f553b4e531/juxamasigibaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f771ef-af78-4686-8330-b2fef4e0b15d/wevunitotujoliwugirur.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_off0000bf85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF85 5104 bytes
SHA-256: dac11816c4115594b3ca20aa2d37c1804e1634fa34c32b4cb0780b03d189347c
font_01_sfnt_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 10108 bytes
SHA-256: 1eed10182f60767e47b7f1fc5b5bc5a63c2185f28646f00ac1bd8af663b6772a

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