Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae7ebbfc6fe0731…

MALICIOUS

PDF

73.0 KB Created: 2021-02-14 17:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dd6187dc6db5918551841e0a8cc8b7f7 SHA-1: 7dc03b08257c28cedf3a9261af8c40dcc2f2d2f6 SHA-256: 6ae7ebbfc6fe0731cb0591e90382e251b8b28c3df76df2187aecf5a04606b919
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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/wix?keyword=sa+border+war+books In PDF document text
    • https://cdn.sqhk.co/vomifavafo/4PAEbOG/soul_hunters_pork_chop_pets.pdfIn PDF document text
    • https://cdn.sqhk.co/kixowijeka/EhgO0if/flagstone_patio_repair_contractors.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/qibhegg/subapigarowemujunixil.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/vumukekek_xaluvotof.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/dhfaiav/girlfriend_plus_apk.pdfIn PDF document text
    • http://nuverlites.online/diritetmjrem.pdfIn PDF document text
    • http://salonapp.xyz/koketfrwmp.pdfIn PDF document text
    • https://cdn.sqhk.co/segexiji/en6xe1F/zanumulileme.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/hibihjg/donuwuvekalozuwobotup.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/jhKgdhi/walumakajevawifixosadag.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/1D9jgox/pocket_mine_3_mod_apk_free_download.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/sosupejuxofedo/communication_plan_template_for_change_management.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/bandukwala_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/fnma_student_loan_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/kurokolopem.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/gifokeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/62424799331.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_off0000dd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 5184 bytes
SHA-256: 6541f9aad8b97970f0cfdcbf505168d63f48e2bd589fc04fae66c028ff4e2574
font_01_sfnt_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 12348 bytes
SHA-256: a7c9e3955d1ba85085b3e79ae8172ee452223a729620e0eeafcef8abf6713c02