Malicious PDF — malware analysis report

Static analysis result for SHA-256 6400fb31f98f0fef…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 08:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 779ac8c14f9dc8c7be7ebe9a23258c8f SHA-1: 59a56d3f81810ebe0ddf6bb4501aabc32f32e312 SHA-256: 6400fb31f98f0fef121cbec327c4ed9a06f8788288016a7dd35dabcc3c226cb2
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards an attempt to redirect users to malicious content, possibly for credential harvesting or further payload delivery.

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://lozipotod.ru/award?keyword=who+was+a+good+woman+in+the+bible PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421335/normal_60269b4513d4a.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/xuzopusavimuwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5fcc1f4badc6f.pdfIn PDF document text
    • http://abanca-electronica.com/pukikamajote442ex.pdfIn PDF document text
    • http://otomail.business/pathfinder_scaled_fist07ie7.pdfIn PDF document text
    • https://xetebozeb.weebly.com/uploads/1/3/1/8/131872130/diwosoxadev.pdfIn PDF document text
    • https://bitabado.weebly.com/uploads/1/3/1/4/131436956/a5f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485152/normal_6010c9b01b0af.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/Cgc5ZHl/auction_apps_for_cars.pdfIn PDF document text
    • http://barberking.best/76475558399adz0h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5fef844e6d498.pdfIn PDF document text
    • http://gifawel.22web.org/chiru_hit_songs_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_60192f58790c6.pdfIn PDF document text
    • https://cdn.sqhk.co/wevamerazo/i6Ehjm3/ruweditelej.pdfIn PDF document text
    • http://setenilezodad.iblogger.org/memojenavogano.pdfIn PDF document text
    • https://fulidozemupure.weebly.com/uploads/1/3/1/3/131384797/d0d1ffd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifozelig.epizy.com/xudawijozijozubijaga.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/sojukukerunub.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_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 5388 bytes
SHA-256: 464b47b390ffd655c61bab69de7424bc32a764d938f153f3cf85a07ab14cf83d
font_01_sfnt_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 10428 bytes
SHA-256: 90fcc2e3ea04e9b6a43de907fbcfd5a8f7f57614085f2fad3191b169d6ea2dcd

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