Malicious PDF — malware analysis report

Static analysis result for SHA-256 f402c9c89447e1bb…

MALICIOUS

PDF

65.7 KB Created: 2020-11-25 20:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ac854cf7c45e3c4861e158359a5bcd9a SHA-1: 9d3ca50060c6bc55deea9dbd3faff20875a5cd6c SHA-256: f402c9c89447e1bbe82ebae745c6cd2d51e41c10fbafe17283f0575d0bf2f468
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL is a high-priority indicator for this PDF.

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://traffking.ru/strik?utm_term=manova+vs+multiple+anova In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477623/normal_5fa8e959357e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_5fba33532f185.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/tuzamada/68434147149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d031866d-105e-4edb-85be-ad45fa8f8859/zulerarapapexonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded138e2-8e49-407c-ac2c-e62401186a73/91250130446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2f0e13-3b8f-482e-ac97-e73db672ccf9/visualizacion_creativa_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16b9c8c-9f7d-4543-a619-c983248d063d/61960417791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af3b7fa-8756-4eee-a8bd-76aa2c53e446/jamenijoguluruxitowa.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/calendar_december_2017_january_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/carte_du_ciel_interactive_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/blogging_for_beginners.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_off0000c683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC683 4936 bytes
SHA-256: fb4bb16ffb97ee164e9dcdc0c666ec7b65a4975136e32d233b61fc39da547d69
font_01_sfnt_off0000d751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD751 10156 bytes
SHA-256: 8778ebdd9b9a19b5620d66a485565f92c794a63f22137de8faca70a6a1d2fd7d

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