Malicious PDF — malware analysis report

Static analysis result for SHA-256 6493928a59e8e33b…

MALICIOUS

PDF

88.5 KB Created: 2021-03-09 11:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dc1d385b05af1c54e1e0a84723d6b814 SHA-1: 256232a4e2f04fc94cd0f5a180652038fd094b77 SHA-256: 6493928a59e8e33bd9b971aa8e80c4555f4f324493ccef2dd40320141a40fd5e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, indicating the document's purpose is to host a collection of links for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://mezovuduw.ru/strik?utm_term=the+tonya+harding+story+movie PDF link annotation
    • http://mitutepoka.medianewsonline.com/rem_1187_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/fhhNgiZ/rokup.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/ieIkjiO/badminton_league_near_me.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/85382239060.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/ejbBK5J/nitasiwe.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/lasko_ceramic_tower_heater_vs_motion_heat_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/dhcUJGM/nes_emu_apk_full_1._5_37.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/kmwgezJ/hitler_zombie_sniper_elite.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/gMl9hjG/45316121474.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/f55Dgee/twisty_road_san_francisco.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/gTji3c6/cool_trick_shot_ideas.pdfIn PDF document text
    • http://wediwutesifetuw.iblogger.org/dubafonereka.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/why_wont_my_dyson_brushes_turn.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenilu/vheeift/best_rechargeable_vacuum_cleaner.pdfIn PDF document text
    • https://cdn.sqhk.co/zenegiwowi/jhbidgj/16908650997.pdfIn PDF document text
    • http://jelepasit.22web.org/html_to_library_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/avast_antivirus_offline_installer.pdfIn PDF document text
    • http://bujazux.rf.gd/how_to_say_ghost_of_tsushima_in_japanese.pdfIn PDF document text
    • http://fejetowetut.rf.gd/keto_diet_easy_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/felizovaxejanorisep.pdfIn PDF document text
    • http://kixiwuru.epizy.com/manualidades_de_reciclar_botellas_de_plastico.pdfIn PDF document text
    • http://zividovapajawuv.epizy.com/mausam_ki_baarish_song.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/the_comprehensible_classroom_answer_key.pdfIn PDF document text
    • http://savexopuzasi.epizy.com/zolemufu.pdfIn PDF document text
    • http://kodejosukiraxel.rf.gd/fifty_shades_freed_netflix_canada.pdfIn PDF document text
    • http://litopojijerel.epizy.com/how_to_remove_gasket_from_whirlpool_duet_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/56504058360.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 5316 bytes
SHA-256: 8f8610430e9c7c6fe123ff0c81c78457b005d0579ba02f7d11c4af03e26312f4
font_01_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 10776 bytes
SHA-256: d14c104ac746a1338d13497c2a84f49cf0874298b6f145599696bb0b0fc60e1d

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