Malicious PDF — malware analysis report

Static analysis result for SHA-256 85bdfe0dd17cda90…

MALICIOUS

PDF

93.0 KB Created: 2021-02-18 22:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dfd1124876e86378c435640a93e59f51 SHA-1: 2981685ae56cb63eaa550fdada6426087d84fcf9 SHA-256: 85bdfe0dd17cda90c9685d20b594bdef7988fd137d162bedbfd72ec93a26a2db
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious website. The ML classifier and ClamAV detection strongly support this assessment. The embedded URLs point to domains commonly associated with phishing and malware distribution, suggesting the document's primary purpose is to trick users into visiting a compromised site.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=switch+axe+build+mhw+alatreon PDF link annotation
    • https://lujovimujesami.weebly.com/uploads/1/3/4/0/134019161/vepixixaxumofa-pizugujomef.pdfIn PDF document text
    • https://retinagarar.weebly.com/uploads/1/3/4/3/134319249/c3a6ca429585989.pdfIn PDF document text
    • http://biditudoti.22web.org/john_betjeman_collected_poems.pdfIn PDF document text
    • http://mini-cam1.club/financial_market_and_institutions_pdwu04i.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/Y3hcYYo/yellowstone_season_4_episode_11.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/iZha9BU/93822513205.pdfIn PDF document text
    • https://cdn.sqhk.co/kukabelek/HLjj3tz/lofunaruwotafojazofes.pdfIn PDF document text
    • http://sport-stavki.fun/659826006453za6y.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/4hejhjd/free_basketball_games_for_pc.pdfIn PDF document text
    • http://sukuzarimeke.22web.org/age_calculator_app_apk.pdfIn PDF document text
    • http://servicesforsupport.com/giratodamufu7brp6.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/bisazabe/47850242452.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/administrador_de_dispositivo_android_apk.pdfIn PDF document text
    • http://rusowemiwa.rf.gd/kowok.pdfIn PDF document text
    • http://wajufuful.rf.gd/25788185403.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/27927169229.pdfIn PDF document text
    • http://lozekav.epizy.com/jiwuzafiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/underlying_congenital_arteriovenous_malformation.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_off00010f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F15 5404 bytes
SHA-256: 49d9730889813acc26980ba42299ad690c74b8df0a133e7b9c23e9b1a123f2b7
font_01_sfnt_off00012162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12162 15260 bytes
SHA-256: 8c6774f802d117d2eb5323c4e89eed8d298cd882cd4d33cec5800d8e5cab2ae5
font_02_sfnt_off0001513b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1513B 16136 bytes
SHA-256: c5c6a229eedc0c5fabdcfc4553ff0ec7c3bbb2f5f2077e3ba3324a13011cfeda

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