Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecf38ff95d784e0…

MALICIOUS

PDF

68.4 KB Created: 2021-02-03 18:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3500fef1276508277570414697800b94 SHA-1: 100ca5f3bec3c8c2a0a919b0d6bdd8117dd23da7 SHA-256: 0ecf38ff95d784e0e01647aa044d32b4eca26f94aa9a078965dd2461fe7f0e39
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wb?keyword=all%20the%20faces%20creed%20bratton%20sheet%20music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5fcdb657a0509.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/u4JjcA8/4runner_nightshade_interior.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479235/normal_5fce06e0a1392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5ff80ca2ba46a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451229/normal_601aacb1eaadc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388619/normal_5fc5abbd87f22.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/VnmigFp/red_alert_2_remastered_walkthrough.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404296/normal_5feb4da5d2eec.pdfIn PDF document text
    • https://denibemexe.weebly.com/uploads/1/3/4/5/134597338/978891.pdfIn PDF document text
    • https://mefutugotipefij.weebly.com/uploads/1/3/5/3/135304762/9601421.pdfIn PDF document text
    • http://blog-millionaire.buzz/bully_apk_obb_size_kecil692nr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5fd263416678b.pdfIn PDF document text
    • https://kaferafodi.weebly.com/uploads/1/3/0/7/130775544/wasagamapet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebavibokifoko.epizy.com/chronometer_for_pc.pdfIn PDF document text
    • http://mejitakofiragi.epizy.com/tuzisekusererowezisom.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_off0000cc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 5392 bytes
SHA-256: 38ef8e0a8314d822a367a058f4ce6cdab6e11e711d0c068f0ae2089c71664fe9
font_01_sfnt_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 11036 bytes
SHA-256: 158ecf2eb17ee2aa1c7a34f74e462eeed323824b687c52090b89118a324fd424