Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e178073efb6263…

MALICIOUS

PDF

71.7 KB Created: 2021-03-09 23:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5163de8accbaa24f3392a55053774f64 SHA-1: d7f91c1ad32d36a14ff3effb570c062e9357c0a1 SHA-256: 04e178073efb6263d4aea8c8ff18ac047a2976df230ebd5f9b9ccbaea64232e0
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an external URI pointing to 'dafemum.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit vulnerabilities or trick the user into navigating to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=wallpaper+magazine+travel+guides
    • http://fetesitomer.mygamesonline.org/84354454438.pdf
    • http://koparikamoze.scienceontheweb.net/predicting_products_of_chemical_reactions_practice_worksheet_answers.pdf
    • http://gixapedotamerow.mywebcommunity.org/how_to_get_a_mississippi_marriage_license.pdf
    • http://mokaxizekebade.scienceontheweb.net/formulas_para_el_volumen_de_prismas_rectos.pdf
    • http://tuvivukaroj.mygamesonline.org/sananidezafamubeket.pdf
    • http://jajolamuseku.medianewsonline.com/zigolituziludelo.pdf
    • http://sipipewawezizuf.getenjoyment.net/12263755913.pdf
    • http://retamos.mygamesonline.org/maxeg.pdf
    • http://sosepojidoduxad.iblogger.org/butijadirevopifimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fomudebipefasu/spreadsheet_of_concrete_mix_design_template.pdf
    • https://s3.amazonaws.com/wuxupewu/besharam_full_hd_movie_for_pc.pdf
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_fec585e0455340b9b006c113f4535142.pdf?index=true
    • https://s3.amazonaws.com/silubebebefuju/sitemoxutimiwelibivorit.pdf
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_08b5d5109bdf4f83abaee784ae637795.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6252a385-ab31-4d24-96c8-035e01aaf613/48268258870.pdf
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_175feca3fd9242cdb12ab28bde80e521.pdf?index=true
    • https://s3.amazonaws.com/zewimu/85563007025.pdf
    • http://zirutabu.myartsonline.com/what_is_a_hard_joke.pdf
    • https://uploads.strikinglycdn.com/files/a2a14ac8-7768-40ef-835a-75d4ba012f25/2001_7.3_powerstroke_injector_rebuild_kit.pdf
    • http://fowowoge.rf.gd/severe_asthma_guidelines_australia.pdf
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_2fb9497a6b5c4835b652e00dfdaf5294.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_off0000d8ea.bin
3a019e1decd88cc590accf6b297457e2b323a18da14c5c42d295f6068b17d296		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 5404 bytes
font_01_sfnt_off0000eb4b.bin
55207ca288fbc975f8492b465a69a3838632e736255ee1a541ffb076bafddb2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 11120 bytes

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