Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdc9a262c7fd5cb…

MALICIOUS

PDF

89.5 KB Created: 2021-03-06 19:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a06ef4a068ab4837eaacce11b97baad4 SHA-1: da64575c932d1998a4883bc25b8a804ed75a9fa0 SHA-256: 9bdc9a262c7fd5cb08017cab99ad1d99875e797cd1915cc2b5aa619fc4778254
74 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('xezojetit.ru') that is likely part of a phishing or malware distribution scheme. The heuristic 'ML_NYX_PDF_MALICIOUS' strongly indicates malicious intent, and the presence of a 'download button' lure reinforces the attack pattern. No scripts were extracted, but the overall structure and URL findings suggest a phishing attempt to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=how+to+get+paid+books+for+free+on+ibooks+with+jailbreak
    • http://zonerokemub.getenjoyment.net/sepuje.pdf
    • http://baffer-shop.space/africa_a_history_denied_transcripthy731.pdf
    • http://laura-egorova.ru/ligidk5k2o.pdf
    • https://cdn.sqhk.co/kimejijomaki/igePgd9/doubletree_hilton_myrtle_beach_reviews.pdf
    • http://all-casino.xyz/positive_affirmations_worksheete8m4s.pdf
    • http://getdouche.xyz/49694907072o2p3q.pdf
    • https://cdn.sqhk.co/difigobon/aI4ggif/93431185825.pdf
    • http://circulyarkadigital.xyz/free_download_music_editing_software_for_pciiijj.pdf
    • http://pufivuziviv.mypressonline.com/jogonivakoleloguxeb.pdf
    • https://cdn.sqhk.co/kigowabalo/crj3F2n/nazobuguworuzakowenuzip.pdf
    • http://lnstagram-blue-ticks.com/95661256840ydyun.pdf
    • https://cdn.sqhk.co/ruzudulo/hWhbidm/zombie_deck_2020_yugioh.pdf
    • http://ubzvp.com/vanelilulazevaxezozulwr3q4.pdf
    • http://instacopyrightcenter.com/26047926122mu321.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_5b2374aafb1540c1a7e4f9b9192313d4.pdf?index=true
    • http://bivojeda.atwebpages.com/jovos.pdf
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_ef9e2fae0e324a0e952f9699c7be4baa.pdf?index=true
    • http://segimoto.myartsonline.com/communist_manifesto_seize_the_means_of_production.pdf
    • http://vomewudige.atwebpages.com/17611622808.pdf
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_ebf1887606564eb6b0c00b434a03ba3c.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010840.bin
135c576f75979240d0839e289a66d702cb665458f42ffe0593af1ccdcad5d3b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 5636 bytes
font_01_sfnt_off00011b82.bin
ee6715cade97d253ce8ce289666c91b3a703caa33032ecadbb57b37e9a68e832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B82 11464 bytes
font_02_sfnt_off0001426d.bin
97c262c6ae5cfedbd5de21331018c8faf5d37c10cd5d6abcd03951e607579037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1426D 16220 bytes

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