Malicious PDF — malware analysis report

Static analysis result for SHA-256 834086101b2c418b…

MALICIOUS

PDF

66.0 KB Created: 2021-01-10 12:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 5ca930cba6aa3135ad326bac3460b01b SHA-1: 51ffe00aaf6e2d1917c5f7d212263a3c233f99f1 SHA-256: 834086101b2c418b405ac8d0310e5832d6bf2336bb5f6a3b3d91f2297d8440c4
196 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
  • 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://trafftec.ru/shook?utm_term=among+us+play+free+online+game+no+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5fb75c0eae88b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f8c3da03c6e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407552/normal_5fc841cb37330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_5fa69432b7550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5ff363a058714.pdfIn PDF document text
    • https://site-1172655.mozfiles.com/files/1172655/puxenupezigunamir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374857/normal_5fc4038f1e244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5fe1ab70d8b88.pdfIn PDF document text
    • https://site-1174284.mozfiles.com/files/1174284/moto_stunt_race_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408187/normal_5fecafdde74ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fb464b5c42a4.pdfIn PDF document text
    • https://midepixa.weebly.com/uploads/1/3/4/6/134622545/f42a993d57a.pdfIn PDF document text
    • https://kezugefoluvero.weebly.com/uploads/1/3/1/8/131856244/8720dd3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_5fbf01bcac1b5.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/pevuwarobuvowa/ignou_online_re_admission_form.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_off0000c756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC756 5544 bytes
SHA-256: 8b7b07e4e91df21c8012388a150cd091dd14160c94cf540a55afa1013f569906
font_01_sfnt_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 9676 bytes
SHA-256: a6dead50e4108ff7c2b3f07d4d0844a3897ae33d4efaeba81c27e2bf0cd4067a

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