Malicious PDF — malware analysis report

Static analysis result for SHA-256 466ad6e8992a4fc0…

MALICIOUS

PDF

68.2 KB Created: 2020-11-25 11:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ef3af81bcff5fd2ecb12c3b03cb953aa SHA-1: e090f892c6aa5b8bdf0c4f23021b5705f5528d70 SHA-256: 466ad6e8992a4fc0ee3dc4e148c5b69c099bb3d8714353153c89ff4b88ae227a
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, many of which are disguised as software downloads. The heuristic PDF_SEO_LINK_FARM indicates a high volume of such links, suggesting a phishing or malware distribution attempt. ClamAV detection and ML classification further support the malicious nature of the file. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=grand+theft+auto+3+apk+%252B+data+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f98a437377c9.pdfIn PDF document text
    • https://furutivox.weebly.com/uploads/1/3/4/3/134360368/626779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5f8ebfefef2cb.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/belebobuda-xurefoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5fb4aada63bb3.pdfIn PDF document text
    • https://nizovekakajet.weebly.com/uploads/1/3/4/7/134740669/8cd3c1e1edc8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f9c6bf782dff.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/jamokaroxoj/nufuwifiveludejexu.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/need_for_speed_payback_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/vogixezavadofel.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_off0000ce50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE50 5304 bytes
SHA-256: e444aac2ebd6d379e3545d66852cbc0fa235096199d7c761bf8df84916319015
font_01_sfnt_off0000e06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 10484 bytes
SHA-256: 751f4326546ca7c304f4ae626d4cb48e020e21cf7ea5b3a582553718408608c7

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