Malicious PDF — malware analysis report

Static analysis result for SHA-256 484dbeddc27eb445…

MALICIOUS

PDF

68.0 KB Created: 2021-03-20 07:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5783b58fa6f836b71b6c78e6f3ae9944 SHA-1: 38b232e0f9cd9d00c65bc52d3804952eafb6a90a SHA-256: 484dbeddc27eb445bbfdd21b6b62354b9611b3c8af27d18ddbe1845edb56c149
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to an encyclopedia entry, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/wix?keyword=bartram%2527s+encyclopedia+of+herbal+medicine+pdf PDF link annotation
    • https://cdn.sqhk.co/wibetaxor/GI3ijm1/download_frontline_commando_world_war_2_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477387/normal_5fddaf7e77a46.pdfIn PDF document text
    • http://boldly-grow.com/vegetacion_del_clima_polarprusq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_601a647b94063.pdfIn PDF document text
    • http://normab-id.com/dark_souls_3_builds_knight6j49h.pdfIn PDF document text
    • http://reduslimitalia.website/xapazegetovipajazetas3m1l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491705/normal_5ff30df243b6c.pdfIn PDF document text
    • http://iuts.space/453939944064iuqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418747/normal_603bb9bc4fd13.pdfIn PDF document text
    • http://parhelifrl.space/retobdinvb.pdfIn PDF document text
    • http://tosety.xyz/project_management_certification_pmp_cost9529y.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/bhfDp06/jadijural.pdfIn PDF document text
    • https://cdn.sqhk.co/balemarize/aidYNQy/seragi.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/xuwenufivelugejojuxobu.pdfIn PDF document text
    • http://debesur.iblogger.org/arcsoft_print_creations_crack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lidikulogape.rf.gd/design_patterns_tutorial_download.pdfIn PDF document text
    • http://roparewuna.rf.gd/50147152984.pdfIn PDF document text
    • http://zelivitunu.epizy.com/irobot_vacuum_655_price.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/20514444562.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_off0000cc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 5720 bytes
SHA-256: 7598b38556e0873a86c4cd6f84897bea7deb20012aa8b63b55767102baa4356e
font_01_sfnt_off0000dfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD4 10188 bytes
SHA-256: 22930433910789b92d5f3ca534c566cbe7dbb3fa103ae57c7d05bdc6bdddb804

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