Malicious PDF — malware analysis report

Static analysis result for SHA-256 a442109335c5a982…

MALICIOUS

PDF

67.8 KB Created: 2021-02-03 18:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8ca676d4c0fa06b41f178941f75aab72 SHA-1: 8b638652f0b72a2bbfb5159eeea242895780d5d1 SHA-256: a442109335c5a98295fa35afc6098753820e64f7981dd0dec18a76e225476650
202 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/aws?utm_term=clash+of+clans+magic+games In PDF document text
    • https://cdn.sqhk.co/vovewotutal/fjigdjf/90939718191.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/djejgXn/71463446585.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/hDBD2LJ/dunkirk_netflix_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kokedipemi/jgshhBM/87966104041.pdfIn PDF document text
    • https://cdn.sqhk.co/towojutal/idihhjv/evolution_of_species_2_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495271/normal_600db18e4c0ed.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/jb1n3ii/download_game_god_of_stickman_3_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490132/normal_5ffd44ff39080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494160/normal_5fed1b64c1bb4.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/hKighiX/16377022185.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/eujBytv/bird_dogs_for_sale_in_iowa.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/hhjcJjc/61762965365.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/faluzotixupi/wegegas.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/xipisisarasus.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/12665196093.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_off0000cb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB80 5104 bytes
SHA-256: 18305647be745aeef66160b09599424a988bef26ca511281bbba6a13cd13bc7c
font_01_sfnt_off0000dcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBA 11532 bytes
SHA-256: 25293d32d435055387e3be028080d2a8c14ea78c5ecaef60a7e622102bd2f3e9