Malicious PDF — malware analysis report

Static analysis result for SHA-256 896e14f61cca4fa7…

MALICIOUS

PDF

68.6 KB Created: 2021-01-01 09:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 280d0a2263e70f13802ed01633d853b5 SHA-1: 75d62272b9d6f81c35db7a36c4e7729351245d8e SHA-256: 896e14f61cca4fa7f8484fcb45213caea74c25f771082444f0466622a7c554ca
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/aws?utm_term=piano+sheet+music+popular+songs+2018 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fe30b220e3c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fd22db46cc2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_5fae0ec0d3f3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fbe3273b6173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f89faee07e4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd86b60f3080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_5f986266c3346.pdfIn PDF document text
    • https://cdn.sqhk.co/wetoxojixan/igigKu6/mod_mutant_creatures_1._8._9.pdfIn PDF document text
    • https://mozeduxazos.weebly.com/uploads/1/3/4/0/134018133/2156942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5f9272c145431.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/ihgUTja/kpop_dance_cover_bts_idol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5fb2d78c20796.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/386189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_5fbb3488b8e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5fb29ee984419.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD63 5868 bytes
SHA-256: 21c430b1e681b9e0086df99a0df88bf21fdff168acc42c74cb1cfb8f44eac286
font_01_sfnt_off0000e136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 10656 bytes
SHA-256: 25c32c9751981a561999074e3b7383fd55bad0811beacaf92c7e0e675bfc010f

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