Malicious PDF — malware analysis report

Static analysis result for SHA-256 7798697a5dfda1b0…

MALICIOUS

PDF

83.6 KB Created: 2021-03-13 15:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d055163c4ef17785e3bef562c6b7b5f0 SHA-1: d7151baac4eba7fe76d2881fa34e5e42a96ec1d4 SHA-256: 7798697a5dfda1b04ff9bb0eb9521b97e65808272caf8b63b9d54213e8b2a6a4
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. Static analysis heuristics and a machine learning classifier flagged this PDF as malicious. The embedded URL, 'https://nipisod.ru/strik?utm_term=how+to+tell+which+rainbow+vacuum+i+have', is likely used to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=how+to+tell+which+rainbow+vacuum+i+have
    • http://forovasax.medianewsonline.com/jurobepofowa.pdf
    • http://vowuzemiru.medianewsonline.com/character_development_template.pdf
    • http://zuzorovix.scienceontheweb.net/computer_networks_and_internets_douglas_e._comer.pdf
    • http://niverokime.iblogger.org/vewolujebewetuligilotuni.pdf
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5feb4f797b163.pdf
    • https://cdn-cms.f-static.net/uploads/4382972/normal_6034effe8f234.pdf
    • http://vuwefedope.sportsontheweb.net/beating_the_wall_street.pdf
    • http://fisusuwisefib.22web.org/calibrate_battery_android_manually.pdf
    • http://xitabijasava.getenjoyment.net/temuriwetadenaxos.pdf
    • http://zakomuxoza.getenjoyment.net/the_metaphysics_aristotle.pdf
    • http://pesuloduf.medianewsonline.com/best_poems_books_to_read.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/rodakarugupoko/30370613560.pdf
    • http://bezopiwuzalobit.rf.gd/national_climate_change_action_plan.pdf
    • http://gugefojekasarul.epizy.com/60235268987.pdf
    • https://s3.amazonaws.com/sojuravewi/65451507871.pdf
    • https://s3.amazonaws.com/davawina/bajaj_bajuri_trans_tv.pdf
    • http://pudofifomabevin.rf.gd/wepadudugu.pdf
    • https://s3.amazonaws.com/tixedujegibex/how_to_prevent_ice_buildup_in_samsung_refrigerator.pdf
    • http://xexovigir.epizy.com/gta_san_andreas_cheat_superman_code_ps2.pdf
    • http://lidusikopi.rf.gd/31650221387.pdf
    • http://binasizula.rf.gd/xepibo.pdf
    • https://s3.amazonaws.com/tanapilamaxi/how_to_determine_bearing_capacity_of_subsoil.pdf
    • http://wokebusaxefani.epizy.com/chronic_constipation_acg_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb83.bin
1f87abe6fb6666f729deca2412d5f073ee6ffac7e400741b6f4139b546acd75c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 4996 bytes
font_01_sfnt_off00010c64.bin
2249c790f301a093ae18ec6c28082c5f00b7e9d75c406bb40bd84848280bbca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C64 11080 bytes
font_02_sfnt_off00013246.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13246 4324 bytes

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