Malicious PDF — malware analysis report

Static analysis result for SHA-256 93344ef015af763f…

MALICIOUS

PDF

67.0 KB Created: 2021-03-14 05:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48b368be8bb8df0945e68933ae830e1a SHA-1: d4e3e1b87262a94c350f6555919d0dfc7d70a967 SHA-256: 93344ef015af763fdb61f0e36b58a9d3d24b569894f35a233407079957ea9018
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, aligning with common phishing and malware delivery techniques.

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://seumenha.ru/strik?utm_term=melnor+xt+oscillating+lawn+sprinkler+lowes
    • http://penageli.getenjoyment.net/gefatukasojopomog.pdf
    • http://xasedogamif.mypressonline.com/32701849303.pdf
    • http://kijofizovurisos.medianewsonline.com/my_hp_officejet_pro_8500_wont_print.pdf
    • http://nomokesus.sportsontheweb.net/char_broil_analog_electric_smoker_instructions.pdf
    • http://sipoxamux.22web.org/contemplate_synonym_formal.pdf
    • http://vutunema.mypressonline.com/how_to_get_a_replacement_drivers_license_mississippi.pdf
    • http://lumufurisazela.mywebcommunity.org/bucket_elevator_design_calculations.pdf
    • http://raxuzogigegekaj.66ghz.com/gonuwalidi.pdf
    • http://jovepodixowofow.mygamesonline.org/losur.pdf
    • http://penerete.66ghz.com/factors_affecting_solubility_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lavapokapajemob.myartsonline.com/tefal_bread_maker_recipe_book.pdf
    • http://rosevasejila.myartsonline.com/idsa_cellulitis_guidelines.pdf
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_686818819fce44f0a4b9eadcf5ad2345.pdf?index=true
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_4f25b3b9c0294fbbaa6cbf42ab7750a8.pdf?index=true
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_717b8ceca189441a9fb792c526e2a8be.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d95a8724-fb8a-4c69-a9de-74026eb0c96c/data_manager_job_description.pdf
    • https://uploads.strikinglycdn.com/files/7f11019c-0de3-4cdf-91f5-ebc199baeff4/eso_bloodfiend_reapers_march.pdf
    • http://tafaredos.rf.gd/2331582229.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_off0000ca6c.bin
4f837558069e7ed3b1c29e04ddaa346449e4842c684ff483fc647095c0608606		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6C 5332 bytes
font_01_sfnt_off0000dcc2.bin
89f1bb6455cbc99f311702bf9ae74b5939027c1a5888f4a79f4c9b2698f47116		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 9956 bytes

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