Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c81ff1fefcf2ce…

MALICIOUS

PDF

63.5 KB Created: 2021-02-01 10:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0c294a10f133f412335b084d4cb27a69 SHA-1: 82993a31146f3dd9640332483f9c4ef0dea7eb08 SHA-256: f9c81ff1fefcf2cea89228b6f4e750b9fb3a492a933bc4756da7ac15b28bb678
136 Risk Score

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://bologen.ru/aws?utm_term=tcode+for+aging+report+in+sap PDF link annotation
    • http://youla-24.cc/730360702621nlek.pdfIn PDF document text
    • http://mrt36.ru/food_wars_season_5_episode_3_release_datelyhl3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_6001c3dde9850.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/70293415203y5pg6.pdfIn PDF document text
    • https://zewurutivuzaned.weebly.com/uploads/1/3/4/8/134888434/pavavobakexugat-muxatikopesu-gagosuba.pdfIn PDF document text
    • http://milanbeachs.space/vabamisumeputagulibi31izk.pdfIn PDF document text
    • http://itawegan.space/niwasogutokabtg7g8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459057/normal_5ff2720662faa.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/xelimewat/neloko.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/3242488989.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/gobekanakumiwizeluziz.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/blood_circulation_diagram_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/browser_smart_tv_hisense.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/equipment_maintenance_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/android_tv_fr_raspberry_pi_3.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_off0000bd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD43 5240 bytes
SHA-256: d0aecf6425d06aba7cab426cf7c6f4665904973f1b9cb81920ab4f11ebbb8182
font_01_sfnt_off0000cf2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2A 10016 bytes
SHA-256: fb4cca994e7c7c51f5c3e2c37da63d8517ca6bdde3eb337d6047e73a89fbfd42

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