Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb50435653af541…

MALICIOUS

PDF

72.8 KB Created: 2021-02-17 02:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a64d76176f5a2625f6ea5eece86be98f SHA-1: 0b5acae3f3b6ef928acdcc27e8c06cb083a46550 SHA-256: cfb50435653af541439020bf202d9cb8e537817a9c55b945ac1a9801cf553f24
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://druttle.ru/wix?keyword=matchington+mansion+hack+apk+download PDF link annotation
    • https://cdn.sqhk.co/vilonunufuk/2cwXjjW/reparejuvujolig.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/jiWMQz4/steroid_brick_breaker_shooter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_60142b6ab846b.pdfIn PDF document text
    • http://detonic-shop.website/algebraic_proofs_worksheet_with_answers_gina_wilson72i92.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/ifhfhhb/bafozudem.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/NIjdjiA/spongebob_moves_in_hack_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_60285f86c8549.pdfIn PDF document text
    • https://cdn.sqhk.co/palubavuz/hiq6Uif/mystery_castle_hidden_object_seek_and_find_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajorasuxanuvil.epizy.com/blade_of_the_immortal_movie_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/excel_quick_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/jesuwituzovez.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/85899986609.pdfIn PDF document text
    • http://lojixebaxademim.epizy.com/wufeguxujori.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/vezupamavoxoza.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/68969939851.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/47408210438.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/91741366508.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/coreldraw_cdr_file_viewer_free.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_off0000dcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB1 5552 bytes
SHA-256: 0dff228644524cce409e5fbc32da61cdb60f9621b7e386a2bffa9fc6e527bb3a
font_01_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 11516 bytes
SHA-256: f468ab2650b5a609ea405e4c93c59b500772ed25e9f68ed043bd9b3b17d233d2