Malicious PDF — malware analysis report

Static analysis result for SHA-256 f020abc3ed50861a…

MALICIOUS

PDF

70.9 KB Created: 2021-05-03 10:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 55d0c3172a093c26cb6306b4f8a1385b SHA-1: 2f161f8bb73dff8170e6408e429b73781a49f73c SHA-256: f020abc3ed50861a69b78bb469c89a00f29d214b00b3039ca65fe6fe909ad05c
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, with one heuristic specifically identifying it as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=how+to+use+adhesive+vinyl+on+paper PDF link annotation
    • http://pusovemolexed.scienceontheweb.net/troy_bilt_lawn_mower_blades.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/hjxohaa/34531725549.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/application_letter_for_ojt.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/hGhdJhc/how_to_view_hidden_files_on_macbook_pro.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/82162630491.pdfIn PDF document text
    • https://cdn.sqhk.co/silonifer/5zhfKgf/56683448707.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/igdO7gf/ice_rage_hockey_multiplayer_free.pdfIn PDF document text
    • https://cdn.sqhk.co/memukodafum/hggYKjj/dell_latitude_5490_laptop_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/ihbIus3/car_racing_speed_real_classics_race_pro_drag.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/EpDojbA/team_bc_female_hockey_roster.pdfIn PDF document text
    • https://cdn.sqhk.co/gedofovel/dHbeGhd/66550292908.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/kalender_2020_mei.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/hXiabZJ/88384485182.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/ftZVPgg/vofexinoputegawilut.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/hhhgdhj/wolf_life_simulator_2017_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/bx0tcDj/schema_electrique_d_un_alternateur.pdfIn PDF document text
    • http://timinome.getenjoyment.net/xoporu.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/R4v3Uij/flags_around_the_world_game.pdfIn PDF document text
    • http://laketofetujeso.medianewsonline.com/biofeedback_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajamozaxekega.atwebpages.com/ripidavorijarutexixumir.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_off0000d921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 5264 bytes
SHA-256: 463781f1faab526bd34db89aadc2d57f5d8525fb409f59e6f571c5434ecd9749
font_01_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 10240 bytes
SHA-256: 2c2ff056db29a6a89d9ccd90d45ae8d1dc50ba27d1ef4bedfd0bc789514eab8a

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