Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6758dba6dc31e4b…

MALICIOUS

PDF

77.3 KB Created: 2021-02-27 05:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8507e36836e45131c8182a7387d0de31 SHA-1: c77a653d647c087b10e70240096947ed3a4da5b8 SHA-256: c6758dba6dc31e4bd07b8b2f8520462eb0d15b3cf6868a497fe905b7b2944750
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://xajibur.ru/award?keyword=nikon+dx+afs+nikkor+18-55mm PDF link annotation
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/b6fb5ecfe581c0e.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/jijhheu/19153369832.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/ggIiesQ/61365117494.pdfIn PDF document text
    • https://cdn.sqhk.co/pukefoxer/C0gfgfP/26025225281.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/j1Ctmhc/3816274019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mebukaronov.epizy.com/dv_lottery_application_form_2021.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/lezodolejodutamuz.pdfIn PDF document text
    • http://pirafabitibabik.rf.gd/81775486543.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/tobazizuwiva.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/tisugaj.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/electrolux_vacuum_repair_shop_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/star_wars_cello_sheet_music.pdfIn PDF document text
    • http://bodiluduf.rf.gd/hound_of_baskerville_full_movie_in_telugu_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/roxolekuzake.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/vadofefotavonokepuzigore.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_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 5524 bytes
SHA-256: fa8c180accb4d7b1426a2c42da26444cb6944cb5018b47a0837fd8ff96bfca9a
font_01_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 11516 bytes
SHA-256: 7919d67e50e2d01400d059e9860cdae6b0a6fc67ddc7acede5e504cf6afab6cc