Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f269703555f168d…

MALICIOUS

PDF

84.8 KB Created: 2021-06-13 18:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee135a349d951a3e4156834f9edd49a6 SHA-1: d6322f501214896ee62a51d277d1464c88582e0b SHA-256: 0f269703555f168d5a7fa2cdcfb59c87d6b0883f64785a4301e5056f46709f8e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, with a high concentration of links on disposable hosting and a suspicious UTM term redirector. The PDF's content, though heavily obfuscated, appears to be a lure, likely intended to direct users to malicious sites for further exploitation.

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://coretry.ru/pbw?utm_term=rational+numbers+word+problems+for+class+8
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/1372919.pdf
    • https://static.s123-cdn-static.com/uploads/4468540/normal_5ff9b491422ba.pdf
    • https://cdn-cms.f-static.net/uploads/4380707/normal_604ab00f0dda8.pdf
    • https://govexofube.weebly.com/uploads/1/3/1/8/131872198/vuwixef.pdf
    • https://riderasal.weebly.com/uploads/1/3/0/7/130738784/watudoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/38136337-3b13-4a5b-8626-e0b42cbdf521/emergency_food_companies_in_utah.pdf
    • http://molitutolu.pbworks.com/w/file/fetch/144545583/zuwena.pdf
    • https://uploads.strikinglycdn.com/files/c7bad184-fbe6-4dca-bf7d-92b2942ca91d/mortal_instruments_series_books.pdf
    • http://ravowibosu.pbworks.com/w/file/fetch/144985068/coin_master_apk.pdf
    • https://uploads.strikinglycdn.com/files/1fb1df87-8729-459b-9d45-84c061341408/divina_commedia_inferno_canto_i.pdf
    • http://moxulolo.pbworks.com/f/mafunu.pdf
    • http://damopijos.pbworks.com/w/file/fetch/144499032/planet_of_the_apes_2001_full_movie_download_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/08e48b46-84ce-4c71-9b07-3bbfeadfef55/are_autopsy_reports_public_record.pdf
    • https://uploads.strikinglycdn.com/files/2e34dad4-d531-4d95-be49-386f7346650b/64374292983.pdf
    • http://wuwolufit.pbworks.com/f/yowhatsapp_by_fouad_mokdad.pdf
    • http://palejemevat.pbworks.com/w/file/fetch/144512820/27192363368.pdf
    • http://mukonisu.pbworks.com/w/file/fetch/144720852/how_to_reset_my_sony_xplod.pdf
    • http://masigali.pbworks.com/f/99494904449.pdf
    • http://gulisapil.pbworks.com/w/file/fetch/145195308/csgo_command_for_wallhacks.pdf
    • http://funesut.pbworks.com/w/file/fetch/144745059/vander_s_human_physiology_14th._ed.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_off00010a71.bin
9ddd66c8eefd1382e521e65e5f3a2bc41e6cc181e7cb39f01772f9ced82a70a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A71 5736 bytes
font_01_sfnt_off00011df2.bin
6fd8e29306544d1a0564df3736a9d9606575b92c522e1dd313742d9b9b1f78d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF2 11772 bytes

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