Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a453994bf89aef…

MALICIOUS

PDF

72.2 KB Created: 2021-02-21 09:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c4194a5a576528956051131853731053 SHA-1: dd44413e824e072129a5c11dda4183b9fc6f9636 SHA-256: b8a453994bf89aefeb4f496665d972caf2b132b59835a8bc177871ac989a5b65
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=boom+beach+apk PDF link annotation
    • https://cdn.sqhk.co/sebuwemid/Cgc7ib6/shell_club_fidelite.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/juja8hc/9808908036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5fe634a62b076.pdfIn PDF document text
    • https://cdn.sqhk.co/jifonakilux/X5qzt8M/t_mobile_store_menlo_park_mall.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/iehiwdF/katutux.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/ehjBmUm/43708048602.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/Wggha9b/ghost_followers_ios_app.pdfIn PDF document text
    • http://nazhivy.net/citra_emulator_apk_iost79ai.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/eCzjdhf/wrrc_world_retro_racing_challenge_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/ieRvJgh/weporiturefitajagavetiwer.pdfIn PDF document text
    • https://pakoverixofe.weebly.com/uploads/1/3/4/7/134771358/fadedelape.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/QUhBAie/49428490634.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/cdc8099096.pdfIn PDF document text
    • https://cdn.sqhk.co/xamewivuvus/s7jhhgK/orange_computer_game_character.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/iilrVUI/ikea_desk_organizer_shelf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fcd348368a2c.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/uOGgh9y/96821836241.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/hfNRLjd/free_wallpaper_for_samsung_galaxy_s8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 5120 bytes
SHA-256: 7c242f9c9ab25e5148ab832a5c1c42c5603699d6b1e3b4825d74a7db97668e93
font_01_sfnt_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 10584 bytes
SHA-256: 5e7d97e95f11aa0a8d11f9f10336f2b57690293cdeb78e02efdeec81aa2a43ab

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