Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2834fc4191e36f4…

MALICIOUS

PDF

84.4 KB Created: 2021-04-05 03:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea24c3ec53423adcea6d000eefca0ebe SHA-1: e23c5c904c92be481238b891b09889e7c7a7bb82 SHA-256: d2834fc4191e36f4ec6184fc0ae5be5b59f17e3c13125256547e27d8750bc306
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning model and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to suspicious domains, suggesting a phishing or redirection attempt. The presence of 'utm_term' parameters in some URLs indicates tracking or campaign-specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://leonvi.ru/strik?utm_term=how+to+replace+arlo+doorbell+battery
    • http://busforpay.online/alfabeto_para_imprimir_y_recortarknwl2.pdf
    • https://cdn-cms.f-static.net/uploads/4426261/normal_5fe6663baa740.pdf
    • http://wordwild-store.com/prisoner_b-3087_character_descriptionn9st9.pdf
    • http://you-bestshop.xyz/learning_radiology_4th_editionhkmkc.pdf
    • http://stnold.com/what_is_derivational_affixes_in_englishj06uq.pdf
    • http://gravkamen.ru/kubewewagodoleu3.pdf
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fd62bf8e7332.pdf
    • https://static.s123-cdn-static.com/uploads/4421056/normal_5fdd3ae5ec8d5.pdf
    • http://trend-sales.fun/98921864974xdldv.pdf
    • http://1freedom.space/179599459813yb2o.pdf
    • http://50offstore.info/tilefutupofaraxadurgv9hd.pdf
    • http://sedouche.xyz/how_to_become_a_general_contractor_chicagoh6mnk.pdf
    • http://vizezokope.iblogger.org/mufitupidubavumosubat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/46f70e58-c38d-4e6a-8adf-6514fdc18e37/can_you_own_a_slave.pdf
    • http://magakawigola.epizy.com/probation_evaluation_form_sample.pdf
    • https://uploads.strikinglycdn.com/files/ed5a023a-7f29-4336-bf2b-8d2242088fbd/the_unwanteds_book_series_in_order.pdf
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_cda942346444478ea14d050b8d6c7439.pdf?index=true
    • http://folalolitawos.epizy.com/29428055710.pdf
    • https://uploads.strikinglycdn.com/files/e1a2c98a-ad28-49bd-bf7c-bba3f2488c8e/falajanubazab.pdf
    • http://xewaditina.epizy.com/rutaxasiwevinokoz.pdf
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_cd143548662c47b5bb0e0b6ca5e188e2.pdf?index=true
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_d1fdd83a879d4bb585f15b704cdfca1d.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_7596f2abaaaa46afb08d2784f6e33221.pdf?index=true
    • https://uploads.strikinglycdn.com/files/903c4aa7-8939-4fd8-bc29-162c10c28d96/30205743364.pdf
    • http://xenemusexo.epizy.com/what_is_the_highest_score_on_a_mensa_test.pdf
    • https://uploads.strikinglycdn.com/files/64817b75-a980-4b2a-b15c-fd169f309a70/weber_e-210_gas_grill_parts.pdf
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_1fa4471ceb9942ccaff940818648df38.pdf?index=true
    • 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_off00010c60.bin
8d3fa3ed7b4dc98380347ffeafb8bde1a81bea10a08bf9eaa96135c722a6f307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 5184 bytes
font_01_sfnt_off00011e1d.bin
c3c0a460e2e564e706a0a7bfdc32cfa575037deda8671048b3f060f609e49d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1D 11000 bytes

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