Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c728a4255f84ef8…

MALICIOUS

PDF

69.3 KB Created: 2020-11-20 09:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bef0db9eb71c8728b5a0f7893fd88cca SHA-1: d6e3d9ed41732280ddf90c62260bf0ee01813190 SHA-256: 7c728a4255f84ef818036afe5ed359562e4edc1980e63e606c3716e0a71c5e47
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 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL suggest an attempt to lure the user to a harmful site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=how+to+access+artorias+of+the+abyss In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5fa152c2390f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_5faf11965e6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_5fb47b98a153d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fb4df2317576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5f9ce5f1e3d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5fa0da8f88ab3.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/kulinisokakewi/vobinebatumivakado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5dad1e-2b08-4429-9e8c-5079c70fb01e/21082868368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71601360-a3b6-4e95-ad75-b23a21891d1a/28295736832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f9e210-0f62-4ca4-948c-fe0a13a1c0e8/kamajunanov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3403b0-f39a-42f1-887c-c11264706a2d/diciembre_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/xamuru.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/blood_type_ab_diet.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_off0000cf46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF46 5232 bytes
SHA-256: fd1aca252f2cc7d2fdac7851f48ec0d572ff7abf09d98b56c3ef6142a38dcfde
font_01_sfnt_off0000e124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 11680 bytes
SHA-256: 1f4bcad74b9927a6e9350b64f0e41af14a5af55e57b364bb94a399e4478476af

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