Malicious PDF — malware analysis report

Static analysis result for SHA-256 4875764eadad6ce9…

MALICIOUS

PDF

71.4 KB Created: 2021-02-19 16:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ed164e95b5adf2ed3191f44cf9bcab53 SHA-1: 163a05f4b566133694c6cad969fb8d24b5f61126 SHA-256: 4875764eadad6ce98359c1a03cb61306ae6aa1924a67a60e8894089adb00164e
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://druttle.ru/wix?keyword=henderson+county+arrest+warrants PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401697/normal_5fe0e0d88e6e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484999/normal_5ff8ba107ddf7.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/Djchbhi/80207516241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601caa44f3bc3.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/3888391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414172/normal_6002af4734a88.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/RgiLhi8/6674398532.pdfIn PDF document text
    • https://mozakemu.weebly.com/uploads/1/3/0/7/130738716/3843953.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/uZLgjhj/dinosaur_game_deadly_dinosaur_hunter.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/ijdLkSC/zombie_survival_3d_game_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fd0fa51f28cf.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/ggoicgg/the_eagles_their_greatest_hits_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_60236264ac84e.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/ghdhdgh/60776020032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_60174e4e1ebee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_601136916c8b1.pdfIn PDF document text
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/957e4e2617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fupofew.epizy.com/animate_cc_software.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_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 5056 bytes
SHA-256: 99fbac81e460ed83f3585782224fec82e96ecc23a699fc49f1d7501f291984b4
font_01_sfnt_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 10464 bytes
SHA-256: 752e6d913e7931d8022353c4497d55b945fd935340ea55257a5d51ead76ac71a

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