Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5f03eb190ab783…

MALICIOUS

PDF

67.9 KB Created: 2020-11-14 19:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9c2c9d50b3615af7fc6eb3328bb31770 SHA-1: 853ee417d70ca38668551abfd8d0c59a750dd137 SHA-256: 4e5f03eb190ab7830378db468ac730dd55864b3047b17c76abc178e49943ead5
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://ggtraff.ru/123?utm_term=ncs+2020+calendar'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests the PDF is intended to lure users to a malicious site, likely for phishing or malware delivery, aligning with the Spearphishing Attachment technique.

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://ggtraff.ru/123?utm_term=ncs+2020+calendar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f9f248850757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8de62e72d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410214/normal_5fa769df1d66e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5f9ec11e967a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f8a93b23a357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f9e581647f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5f90962785bf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5f9a75495f52e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8cffe3392b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5fa193c6c0044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_5f8dc02fecff1.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/b293eacd-f09f-45dd-9d22-76c65ec44120/gopro_hero_3_silver_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc07c24-b0a5-4126-9261-0ea017868cb2/beckett_basketball_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb5af62-bf3e-480a-b9da-30318e3f493a/rustler_xl_5_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/95489727003.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_off0000ce8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8D 5176 bytes
SHA-256: fe7918612f26e6788e3ea7c3aed0321722cffc10ee1355e141370b1428e80b74
font_01_sfnt_off0000e03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03C 10196 bytes
SHA-256: 819579ddc45d7714e004eb5fca20b565b20f5485bf81175948c8a6bc18ac0c1f

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