Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d09821468d30bf…

MALICIOUS

PDF

75.8 KB Created: 2021-02-28 00:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c83b06e8e4ba0c37d8dc95bde0a796c SHA-1: 5815297bceb1c49bc19a926135877bc79f380936 SHA-256: 12d09821468d30bfcdbaa968b83fa4bb76f38b2c1d926a1aeeb059ba69b4b81d
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a likely phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links, potentially to lure victims 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://soxebez.ru/wix?keyword=perception+process+steps
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/risetupebuwewag.pdf
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/148025.pdf
    • https://gevotasi.weebly.com/uploads/1/3/4/3/134389209/sutabavobopinoxepiv.pdf
    • https://cdn.sqhk.co/sedazozesufu/hgiSjjJ/29735154119.pdf
    • http://morasuxod.getenjoyment.net/cell_cycle_and_dna_replication_practice_worksheet_1_answer_key.pdf
    • http://gudelew.mywebcommunity.org/aristotle_poetics_tragedy.pdf
    • http://zoguponuwuxoli.medianewsonline.com/63000896721.pdf
    • http://kadaxejob.mypressonline.com/windows_server_2012_r2_datacenter_product_key_generator.pdf
    • http://lebizifijafaxim.medianewsonline.com/what_can_you_do_with_a_quantum_physics_degree.pdf
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/tujixagu.pdf
    • http://hookup750.website/5g_nr_pdcch_beamformingopk24.pdf
    • http://lizowaw.scienceontheweb.net/dunejapusorefuk.pdf
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/1808383.pdf
    • https://cdn.sqhk.co/nimuxugemu/d4gigfE/car_parking_games_unblocked_66.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sabiwilurase.atwebpages.com/bukotoxodopawo.pdf
    • http://gafodix.myartsonline.com/farmer_boy_book_summary.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_off0000ef07.bin
5f61617fee76d8464e04e8796bc6258705f16b463b9479f4ecb8ee4d3fb2f54d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF07 4688 bytes
font_01_sfnt_off0000ff0a.bin
5735a41e0ae58480bc54b54b70f7f15c3ae16e2933f45521ab632f954d0da80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 10332 bytes

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