Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f88600a082a1e7…

MALICIOUS

PDF

67.0 KB Created: 2021-03-04 08:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 04cd8da5612fc0ebbf15495368be1866 SHA-1: 4b89d38f96227913405b01251f77695041de998e SHA-256: f5f88600a082a1e7908729cff66caff5af29bf261d37004c4ca0febfe97cf22e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=wow+guide+book PDF link annotation
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/rorodosadiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_6027d5d9555b7.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/cie7OX2/wasugegemipegogim.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/6895831.pdfIn PDF document text
    • https://cdn.sqhk.co/ponatabet/6gjNihi/best_open_world_driving_games_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/geVhhzb/6150725987.pdfIn PDF document text
    • https://gijufonuvaxi.weebly.com/uploads/1/3/4/8/134874477/fewakexamubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379733/normal_5ffa40f2630bd.pdfIn PDF document text
    • https://ginixagizelak.weebly.com/uploads/1/3/5/3/135349131/8627324.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/bWjhZib/all_stars_cricket_garden_games.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/besafefaf/dd_warlock_subclasses_homebrew.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/giwojagowudiku.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/uruvam_tamil_horror_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/55964561385.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/uidai_aadhar_self-_service_portal.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/asurion_att_affidavit.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/2753507972.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/kigiposurijirunizafir.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_off0000ca65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA65 4784 bytes
SHA-256: ae7f91dbcfc6e39a92bcb112c379af6d22c082c867601b337bd967965d70b73a
font_01_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 10364 bytes
SHA-256: 6c8da4b3106d7a9227061db68129329a2a98a8ca0e1a0cc5f16e4dce6962090e

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