Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebee6dae30afcfde…

MALICIOUS

PDF

70.3 KB Created: 2021-02-22 04:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ea066273bece5703759d61a07a270457 SHA-1: 08c9f758a77c2ddec75b4f0dc71fc3da814a1538 SHA-256: ebee6dae30afcfde15c9cadba74b457c12792a18ca298149a22e624889698125
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=chemistry+chapter+6+section+1+worksheet+answers PDF link annotation
    • http://sdek-24.cc/49161299751vzr8m.pdfIn PDF document text
    • http://1cats.space/lavixy1jf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475209/normal_5ff756519b00f.pdfIn PDF document text
    • http://cheatyou.site/lapuvewejikapefufifoloxuqkf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488804/normal_6002eac269a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fd7d6fab6ef1.pdfIn PDF document text
    • http://zoo-taxi.site/collecting_marbles_a_beginner_s_guide65f1y.pdfIn PDF document text
    • http://microdigitalmeter.xyz/46848553096jiuh1.pdfIn PDF document text
    • http://helplnstagram-confirm.com/48389607695b6cat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fddbe243a75d.pdfIn PDF document text
    • http://boomua.site/52322284136c4b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_601a65c98267f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_60258f074c977.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/juwofuxufijup/transformation_horizontal_gene_transfer.pdfIn PDF document text
    • http://jutatodimat.epizy.com/tiramabofowuwubepafovofur.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_off0000d6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E1 5508 bytes
SHA-256: e5e8f55a405c6407cc9da08b052f319862a97da0d932658ffa20f0d3370927c5
font_01_sfnt_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 10044 bytes
SHA-256: 8fed2d5e08574aebe24ab10533cade837b0dc5110dc20c53a1d282db5b1da099

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