Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a3329011727b6f…

MALICIOUS

PDF

70.8 KB Created: 2021-01-07 01:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 51417324966ff995aa42a0d99ff4ec86 SHA-1: d096b24301b583fdbba8b604360e993431f0a648 SHA-256: c6a3329011727b6f8361152d89e287f2dd4abf216cffdec89b47da8fa84236c3
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/wb?keyword=nasa%20mars%20panoramic%20view In PDF document text
    • https://darenufu.weebly.com/uploads/1/3/1/4/131438483/7222985.pdfIn PDF document text
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/5d45d.pdfIn PDF document text
    • https://dugizade.weebly.com/uploads/1/3/4/4/134442098/zozinoziko.pdfIn PDF document text
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/4143394.pdfIn PDF document text
    • https://cdn.sqhk.co/rigowodikot/ewcmgcQ/20893802542.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/jhXo0OW/55719792806.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/9361452.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/VThhgd8/bodugalemofefokosoz.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/punurum/39377701911.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/96420969776.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/siniputaloxijowefo.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/christmastime_is_here_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/bhootni_ke_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/48153779394.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/bahubali_2_all_songs_ming.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_off0000d8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D0 5168 bytes
SHA-256: c51b8f27bf16cc6ed1c21a03e28f657cef3bcff43a39f923c108d80a04f8d894
font_01_sfnt_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 10596 bytes
SHA-256: 85e53a52af4b7b1734c4065ade73bc5285b384bb54b58892ec3a5a5ace018d5f

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