Malicious PDF — malware analysis report

Static analysis result for SHA-256 447b78a60ffd85e8…

MALICIOUS

PDF

75.7 KB Created: 2021-04-07 21:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e2e09eb1b2d47399713175edad6a2a2 SHA-1: 11886621de0298163ecd671a3e42700e8bfd7436 SHA-256: 447b78a60ffd85e89cec7f969045faee98b064949f6d73c65e58add43d5d8330
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('jumiwimov.ru') that is likely part of a phishing or scam operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=bss+full+form+in+sieve
    • http://icily.xyz/what_is_the_size_of_an_egg3gi1n.pdf
    • http://vofarufumuwe.iblogger.org/bapafegeferiwelazijad.pdf
    • http://viruxego.mygamesonline.org/snapper_mower_blades_near_me.pdf
    • http://uscreditinquiry.info/can_you_cast_acorn_tvcwhyn.pdf
    • http://idealslimitaly.site/retro_city_rampage_dx_cheat_codes_androidhj6mn.pdf
    • http://jesibijifinuz.mywebcommunity.org/dimanasiti.pdf
    • http://onlinekartiadesi.com/istation_login_for_parents4c67d.pdf
    • http://digitalmicroteter.xyz/mejirenotitomihqq2.pdf
    • http://lnstagram-copyright-supports.com/kabijuzorexenae9djk.pdf
    • http://trixy-matrix.space/sudabapamozobcjdir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rumukejilaji.epizy.com/online_browsing_platform.pdf
    • http://zegorekezape.rf.gd/trx_workout_gym_near_me.pdf
    • https://s3.amazonaws.com/midizaxopazeji/bounty_hunter_guide_osrs.pdf
    • https://uploads.strikinglycdn.com/files/d0c7bdd6-0606-475e-a396-d5e2dbdeb1d3/74938980998.pdf
    • https://s3.amazonaws.com/dubiditiginowo/40787688052.pdf
    • https://s3.amazonaws.com/dukavunivifa/85255152044.pdf
    • https://uploads.strikinglycdn.com/files/f185a4be-09a0-4cd9-a734-91fa711779d4/why_do_my_legs_hurt_while_i_sleep.pdf
    • https://s3.amazonaws.com/fixararololu/sajovusokonobasoruzogu.pdf
    • https://uploads.strikinglycdn.com/files/18f884a0-ae7e-4a07-84e8-9d6f16ed3798/suwokev.pdf
    • http://subezonaziw.rf.gd/73727335146.pdf
    • https://uploads.strikinglycdn.com/files/bbebfeef-5bca-419b-9c17-f0630a7a9f91/how_do_i_use_mods_on_skyrim_xbox_one.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/igcse_biology_revision_notes_edexcel.pdf
    • https://uploads.strikinglycdn.com/files/edf4c4c8-f9a1-47c3-80cb-3be87677cde9/92052947762.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_off0000e906.bin
67f0e7f6ad545f03d435c5a3a00285e399d3c950e529c4d99a628998578ddd50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 4812 bytes
font_01_sfnt_off0000f95d.bin
eb816320f4669e4ba51d3d8f8fe7274b999756949481b51546e609c23bf113ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 11180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.