Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9a26a82a015d18…

MALICIOUS

PDF

76.3 KB Created: 2021-02-26 22:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0faaf9099f8bc3ead290a6e02c1e8076 SHA-1: e2fde2bafb1258fe4d6db42420042fef955773ee SHA-256: 6d9a26a82a015d188465039387d4cc558318ba759547419c9833de0828796e7a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically appearing as a search result for a benign query, likely to disguise malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content. The presence of embedded URLs suggests the document is designed to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=how+to+draw+a+girl+face+very+easy PDF link annotation
    • http://vsspb.ru/lesufolid0d.pdfIn PDF document text
    • http://choosenews.space/prestige_aps997e_wiring_diagramqt54b.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/redskins_scores_2019xppt5.pdfIn PDF document text
    • http://exampl1214.com/best_echo_book_for_cardiology_fellowsrb61u.pdfIn PDF document text
    • https://cdn.sqhk.co/wajivilija/dUjiPT4/basketball_stars_unblocked_weebly_77.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/ahbAifq/app_like_xmeye_for_pc.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/without_conscience_meaning_synonymhouhi.pdfIn PDF document text
    • http://tixshopclub.fun/53063910800mosv5.pdfIn PDF document text
    • http://tryraisins.pro/zogidugijumugkdtv9.pdfIn PDF document text
    • http://timinome.getenjoyment.net/iso_9001_2020_descargar.pdfIn PDF document text
    • http://klossheff.xyz/el_anillo_de_los_nibelungos_pelicula_online_espaol_latinoyjdvb.pdfIn PDF document text
    • http://natlab.ru/the_last_airbender_movie_download_in_tamilyogipigi8.pdfIn PDF document text
    • http://lg-copyright.com/c_language_basics_pptbfcgn.pdfIn PDF document text
    • http://moitender.org/funugumawakorombz9k.pdfIn PDF document text
    • http://letxxnx.org/vizio_e480i-b2_firmware_updatezi6gt.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/40256078430.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/supefujoxopubu/lafutekata.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/how_to_light_pilot_on_williams_wall_furnace.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/candlestick_chart_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/wumipofegova.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_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 5404 bytes
SHA-256: 17f1d5c2845227240f20dffdeed4490eabb6604e99c20ab3b1195c5bf6d24089
font_01_sfnt_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 10152 bytes
SHA-256: 39e07752552c19e177f220dc3620a8d52bdbc30d2de8461c5858d761336c7839

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