Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a9e688452c287d…

MALICIOUS

PDF

78.2 KB Created: 2021-03-17 09:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b371174f814e332da89ba599f247feef SHA-1: dae35a9ff8c2772120c9859fc7f6ebd94a9fb803 SHA-256: 02a9e688452c287d03b26fe68c973d2a20717d6a7ae7d0ffbb50c12707b27c93
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 of which point to disposable domains and are indicative of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is the primary function, likely to redirect users to malicious sites.

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://xezojetit.ru/wix?keyword=heide+trask+high+school+rocky+point+north+carolina
    • http://kotudekudoges.getenjoyment.net/tizulifivil.pdf
    • http://50off.pro/breakthrough_advertising_by_eugene_sus98s.pdf
    • http://qwertyujg.xyz/42039616068ry6nz.pdf
    • http://smartline58.ru/rezelpu49k.pdf
    • http://specrazreshenie.com/fizuzosubobsmjmr.pdf
    • http://juwupexutaval.mywebcommunity.org/36980842054.pdf
    • http://show-visitor.xyz/3364747436gdcl4.pdf
    • https://cdn.sqhk.co/wijelukifap/uicThfi/boy_braids_hairstyles_2019.pdf
    • http://kersita.fun/how_to_write_a_meal_paragraphzdpu5.pdf
    • https://cdn.sqhk.co/numokafas/zjfjbUM/worlds_hardest_game_4_hacked.pdf
    • http://pollsexpert.com/61005978506vzj6i.pdf
    • http://4gusevshop.space/tasc_science_study_guidetyxqv.pdf
    • http://i12tws.website/54985298685xa3ce.pdf
    • https://cdn.sqhk.co/fejukomus/hI3T7cl/veramedipumunejofefipizax.pdf
    • http://kmikaerfs.ru/how_to_relieve_scoliosis_pain_at_homeshnbb.pdf
    • http://clubstore.info/wheel_action_driverskeras.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/001c1d2d-bda1-4cc5-abd7-bbb673fbc826/sears_appliance_repairs_reviews.pdf
    • http://vesedakowata.onlinewebshop.net/letak_ictus_cordis_normal.pdf
    • http://nejesezape.myartsonline.com/wiwix.pdf
    • https://uploads.strikinglycdn.com/files/65ba0dfe-d042-4876-92e1-86b62277c7bd/93421634003.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_off0000f2d7.bin
b4308905f32dac1c4fa69c930e09861497c5f9d65dde07d30f12b05dab42d284		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 5460 bytes
font_01_sfnt_off0001056c.bin
fc0d458a50cf37294d16dd8eb81b1a8ab7e6515a56b793a5ea98a074725a33cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 11144 bytes

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