Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c3ebd5d13e866a…

MALICIOUS

PDF

69.5 KB Created: 2021-02-21 19:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6e3e6d7cf244e7b9d27036effa0c8b0c SHA-1: e4140488f07e80b3e4448a60e40045b7c4991519 SHA-256: 44c3ebd5d13e866ae2743fd15abb5efcbd009ec6cc80d0bffefb97380ceb1646
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=rene+ricard+book In PDF document text
    • https://cdn.sqhk.co/disumuneriva/jdgiIrs/rafefulalekaluzogaz.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/1XVje1k/rikavefimonato.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/ghqTrja/83352751818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489979/normal_601f2f780325e.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/XvGmWX3/13680211870.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368471/normal_5fff47f97fbc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_5fd1255f1a7b8.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/jh1Mmjb/fastest_bowl_in_cricket_history.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/dosipive/saucony_guide_iso_12._5.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/96327612696.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/fuwenofuwiretamigas.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/alkyl_halide_class_12.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_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 4936 bytes
SHA-256: 2bb1ac3f98cb3bf345d9c4ecc02e352757bcacfe86ce8dd6db2250a4f2c07f53
font_01_sfnt_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 10156 bytes
SHA-256: 1474fba709d826f7dfd17946c9fd64a6a34a86190bfa5549d861cd4ca70d16ae