Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0099d9b6c15ad14…

MALICIOUS

PDF

105.1 KB Created: 2021-04-11 10:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d59c166fe1902e9f636de42ca05a0c4 SHA-1: 7cdc7ea4115b857098b340083f2bbe770fcaf78c SHA-256: e0099d9b6c15ad1498a684279be0580981b335b108c26511ac16f8f5d2df8c03
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 URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'Bushnell telescope operating instructions', likely to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/strik?utm_term=bushnell+telescope+operating+instructions
    • https://cdn.sqhk.co/gakilofod/hithfja/job_interview_samples_questions_and_answers.pdf
    • http://kovuzaxaf.medianewsonline.com/pogagepolaxetipaginosap.pdf
    • http://bigops.fun/boribuduarjv.pdf
    • http://xebupado.mypressonline.com/replace_filter_on_robinair_34788.pdf
    • http://busijizi.medianewsonline.com/carmen_overture_piano_sheet_music.pdf
    • https://cdn-cms.f-static.net/uploads/4444110/normal_5fd67a497fd71.pdf
    • https://cdn.sqhk.co/tisufupujeli/jgiahek/befoxigabililaxokud.pdf
    • http://copyrightnotice-ig.com/69729244093yq75f.pdf
    • https://cdn-cms.f-static.net/uploads/4445754/normal_602b030d2f780.pdf
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fd61d465e4e3.pdf
    • https://cdn-cms.f-static.net/uploads/4415302/normal_6064fbf3d8daa.pdf
    • https://cdn.sqhk.co/xagaxubibiz/gggghaQ/cnc_machinist_school_in_houston_tx.pdf
    • http://wivevemeb.scienceontheweb.net/diplomov_prce_muni.pdf
    • http://xafesuvorolivig.scienceontheweb.net/bowflex_xtreme_2_se_manual.pdf
    • http://fegivate.medianewsonline.com/venilemetefexutakozox.pdf
    • https://cdn.sqhk.co/kofatuziwu/X5icojd/download_toca_life_office_mod_apk.pdf
    • https://cdn.sqhk.co/savaketiju/kBL6Ugd/real_steel_boxing_champions_mod_apk_android.pdf
    • https://cdn-cms.f-static.net/uploads/4387567/normal_602c69c9a513c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://furunes.onlinewebshop.net/81341866233.pdf
    • https://uploads.strikinglycdn.com/files/73cf0b2e-552d-489e-a050-c5982e458373/what_is_the_proeutectoid_phase_in_a_hypoeutectoid_steel.pdf
    • https://uploads.strikinglycdn.com/files/91dfa309-a41c-4bf7-b577-d6dcc91f2d69/24821755771.pdf
    • https://uploads.strikinglycdn.com/files/6cef3996-8eb1-435a-8fa9-ccc2f2651bbc/93138516512.pdf
    • http://rabelinowizufe.myartsonline.com/ap_psychology_memory_test.pdf
    • https://uploads.strikinglycdn.com/files/05fedabe-e316-45e5-bacc-84c2251d987c/how_to_turn_on_bluetooth_on_sony_car_stereo.pdf
    • http://pisonepegosa.myartsonline.com/dosekulowuta.pdf
    • https://uploads.strikinglycdn.com/files/f9f0c4ce-dc8b-453b-93d9-8a142911d074/englander_pellet_stove_auger_motor_not_turning.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_off00015d9c.bin
1214f8961cc56b2507bd5bf302f7bfe0889ad2ad372589aa41259cc0ac71c341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D9C 5244 bytes
font_01_sfnt_off00016f72.bin
f95181a7a88cd5dd6bb8aca3dab18573eff65df22bec4f980d1e06324702c375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F72 11504 bytes

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