Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce375249b0fccd53…

MALICIOUS

PDF

117.0 KB Created: 2021-05-07 07:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5212eae6f62f4487a0fbf16356812ef SHA-1: 96a826154952d2a054073b04e1a4cfda705d33ad SHA-256: ce375249b0fccd533531408a0e7b61c63ec746b15f49afb1a795502ca4336e5a
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, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains references to search queries and application names, indicating a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=how+do+i+identify+my+allison+transmission
    • http://winoraama.space/glitter_tumbler_order_formx30he.pdf
    • http://lightstart.xyz/delta_childrens_gateway_4-in-1_crib_instructions3ki3h.pdf
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/futoz.pdf
    • http://worldhold.online/new_public_management_theory_ideology_and_practice80tlc.pdf
    • http://topikufovumedar.iblogger.org/the_righteous_mind_by_jonathan_haidt.pdf
    • https://cdn-cms.f-static.net/uploads/4415951/normal_600fad9542793.pdf
    • https://pazarufawituxib.weebly.com/uploads/1/3/4/0/134000032/3143130.pdf
    • https://cdn-cms.f-static.net/uploads/4413696/normal_602cfd133d1a8.pdf
    • https://cdn-cms.f-static.net/uploads/4366050/normal_601608446423d.pdf
    • https://dukinuvofipul.weebly.com/uploads/1/3/2/7/132711936/90537137eaa6.pdf
    • http://doctorzlo.com/gugoligivamegawijunakileyq0i9.pdf
    • https://lufojujerap.weebly.com/uploads/1/3/4/4/134481619/8109e2ceaf099ba.pdf
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/62193.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0489341c-f798-4e22-aba7-ce6138ee8043/partial_differential_equations_evans_solutions_manual.pdf
    • https://s3.amazonaws.com/gofilafixu/wopalasaxodofibizuz.pdf
    • http://figapow.epizy.com/68868943830.pdf
    • https://uploads.strikinglycdn.com/files/c9712eec-7bfd-4411-b639-2cec9bcb81a4/ktm_125_exc_2008_user_manual.pdf
    • http://jodafibo.epizy.com/architecture_building_design_process.pdf
    • https://uploads.strikinglycdn.com/files/c31f01e9-9c6a-4be4-84dc-145c96be0059/13436458816.pdf
    • https://uploads.strikinglycdn.com/files/28d9d6ad-163d-4c58-a1e5-566c0fab024a/eliphas_levi_english.pdf
    • https://s3.amazonaws.com/fumiposamisur/how_to_sync_sennheiser_xs_wireless_mic.pdf
    • 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_off00018aa8.bin
14a15222b369eba839d2690059d104b50ac7ae2b88c3c56cff6d363f3717ec5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA8 5208 bytes
font_01_sfnt_off00019c5e.bin
2efbaa075954e25882b3b442178cd55df02684ab71d35722162ea26303aca4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C5E 11652 bytes

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