Malicious PDF — malware analysis report

Static analysis result for SHA-256 284720ba713def00…

MALICIOUS

PDF

75.4 KB Created: 2021-04-11 04:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5a302ab1b88fb988ce3beb75777604b SHA-1: b13eb7248548153111a38038dc8b01302c494af7 SHA-256: 284720ba713def00692f5ff1994108a56019f5015d29a18da3199ce3a4646e6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, flagged as a 'link farm', suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a phishing or redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=define+planning+and+its+steps
    • https://cdn.sqhk.co/xugiwatokax/dihzhhg/john_wick_meme_template.pdf
    • https://cdn.sqhk.co/kepozote/jb6Lhj7/gikagagedexepat.pdf
    • https://cdn.sqhk.co/vabedesi/i0WsCSo/5e_telepathy_item.pdf
    • https://cdn.sqhk.co/vasibejovej/cDUoBie/21741923550.pdf
    • https://cdn.sqhk.co/vijukifezu/dnjaHhj/farm_animals_worksheet_for_preschool.pdf
    • https://wemivera.weebly.com/uploads/1/3/4/3/134311686/e3629af5eca016.pdf
    • https://cdn.sqhk.co/netimawifes/igrOYii/ruwugugije.pdf
    • http://linavaluviriv.getenjoyment.net/75023034022.pdf
    • https://cdn.sqhk.co/rizanatu/yiec2gx/46217694908.pdf
    • https://cdn.sqhk.co/vasozaponem/RKszage/piviwinapunuzuwawidur.pdf
    • https://cdn.sqhk.co/kotoweraga/hflhcjb/skylanders_giants_portal.pdf
    • https://kobejepofefes.weebly.com/uploads/1/3/5/3/135317692/jibuleluligefifim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://80ce5912-1c67-4773-adf4-abf614566e91.filesusr.com/ugd/acb48a_6512dae4c8d744f1bee43e0dfe4e0e9d.pdf?index=true
    • http://bivojeda.atwebpages.com/rue21_hiring_age_requirement.pdf
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_2d2d8b6ae8fb4531a73bda61a4f090bb.pdf?index=true
    • http://fawikinego.myartsonline.com/ramosikivitetifekoseni.pdf
    • http://pavabiza.atwebpages.com/3141405196.pdf
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_f1141555d0c04c96a99743a74663cd33.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea21.bin
7e921dcf0ba6e99594a13f81122bfd012b481cfbdb11a6fb7141ba28e24cefb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 5112 bytes
font_01_sfnt_off0000fba8.bin
7d2498a4bc4d7b99212b8d353f9559cee0c1b46cc902d7ff8bb33cc07b684a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA8 10912 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.