Malicious PDF — malware analysis report

Static analysis result for SHA-256 499aa8cff4edbe56…

MALICIOUS

PDF

95.7 KB Created: 2021-03-20 04:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2b583d8bde2821fbaf831af8f1c9b567 SHA-1: 59ef83181f9a6598d4a907af5ebf810d0580f7be SHA-256: 499aa8cff4edbe56420d22569a27555b288cc3acbdf8a739f50d0a782028dadd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to 'vilenefex.ru/award'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload via the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://vilenefex.ru/award?keyword=camerimage+program+2020+pdf PDF link annotation
    • http://nusowutevu.getenjoyment.net/concave_mirror_formula_derivation.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/85142097584.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/gZtsjel/gabefurexazuzovafimumajub.pdfIn PDF document text
    • http://vopezikililurab.mygamesonline.org/15345510965.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/naruto_shippuden_ninja_storm_4_apk_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/XmiiSjh/30952889187.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/20_hp_briggs_and_stratton_engine_parts_diagram_31p977.pdfIn PDF document text
    • https://cdn.sqhk.co/wewutivuv/Ihdyhi6/bullet_raja_movie_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/jfhdijJ/bobofe.pdfIn PDF document text
    • http://jolovomolosubi.getenjoyment.net/vox_ac15vr_footswitch.pdfIn PDF document text
    • https://cdn.sqhk.co/pafitevet/ghjhfhj/jilez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mipaduverututus.rf.gd/67054450293.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/31567750742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a47c55-3b98-4176-98e8-986ff53f6635/47530744472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530c1089-934d-48dd-a0f1-7b807a3dc08b/bejus.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/dell_optiplex_gx620_drivers_download_for_windows_7.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/tifesovijejedulobenimes.pdfIn PDF document text
    • http://jukasuxoseki.atwebpages.com/memifazezopazudedevel.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/theories_of_environmental_ethics.pdfIn PDF document text
    • http://metiguwuwezaza.atwebpages.com/cellular_pathology_techniques.pdfIn PDF document text
    • http://bekogufepe.rf.gd/what_does_yellow_mean_personality.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/85690069600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85011c82-10f8-45e0-8c04-fbe1bf39a646/71131322543.pdfIn PDF document text
    • http://savekuf.rf.gd/top_movie_sites_for_pc.pdfIn PDF document text
    • http://fikilemekegupi.rf.gd/how_to_calculate_instantaneous_velocity_from_equation.pdfIn PDF document text
    • http://bidupoxamejab.epizy.com/medios_de_produccion_del_feudalismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b435bf-a393-45e3-bdd5-35798bf31876/dyson_cinetic_big_ball_canister_vacuum_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45920e95-eb68-4842-bd66-a37fc3fe262f/bible_character_who_waited_on_the_lord.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 5332 bytes
SHA-256: 22b7821d233313b95f3e01e491ae5dbf477ee46207080647b6a17b0a36750f7b
font_01_sfnt_off00012d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D83 13980 bytes
SHA-256: 1d10b183a37e2d11a83d97f9649e04807d923d3892462fc2edad5245f8737691
font_02_sfnt_off000156c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156C2 16836 bytes
SHA-256: e2fb0fe76167e43f07bb0f5e3c6fbda92779173405daa5460626cd4d02924a85

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