Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08f9d594206b2b7…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 17:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7c6557441bda0403104816eefd26769e SHA-1: da60b06cbbc176d6fb93008aadea7be902be9fa3 SHA-256: f08f9d594206b2b70be74755739f1f0eae860252c559877ceb5518d07423bd5f
166 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to various PDF files, suggesting it functions as a link farm or a lure for downloading other content. The heuristic 'SE_LOLBIN_RUN_COMMAND' and the presence of URLs like 'https://druttle.ru/award?keyword=french+dictionary+pdf+free+download' indicate a phishing or scamming attempt disguised as a legitimate download. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://druttle.ru/award?keyword=french+dictionary+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/xojelumegasi/Y8iehPs/download_no_crop_and_square_for_instagram_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/Irhbhbq/41844501863.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/ultraviolet_and_visible_absorption_spectroscopy.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/6idVhgg/fumezunemovuxew.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/ANfNhe5/home_assistant_mqtt_docker_compose.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/dhiax4c/mod_spotlight_planescape_torment_mods_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/mkjgLO6/xipobebuxuseto.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/eeif3ge/tiwanojusudimidevidanamu.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/NThaWM3/99957043608.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/djdjgge/slice_of_life_manga_meaning.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/passport_application_form_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/dhjWiaZ/todelolasabexototuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/VR6YqNY/gana_diamantes_gratis_free_fire.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuwisarov/jhgjieO/18765261838.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/bativerofazakapevaxegu.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/Mhfgjjb/9776122528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koduwutuvage.onlinewebshop.net/79279503956.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/bijaninewedaforusasoxexik.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/how_to_get_a_list_of_commands_in_cmd.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/d_d_basic_set.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_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 5216 bytes
SHA-256: 58878ad7584e70b1635bd5feccbf5fdacb563e72365ae4c2ee2b16cb2f9e77af
font_01_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 10444 bytes
SHA-256: f36b0275d5c49bf62f2bc9669846360b2361c36ce9934197b9fc7d732accebfd

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