Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6ece277936fd0c…

MALICIOUS

PDF

77.1 KB Created: 2021-02-13 17:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 46ba9e3aeed350ab3af9ff3e98d34269 SHA-1: 4647d15d035f9dd4ef9f67727c45a8c4e0fac47b SHA-256: 6f6ece277936fd0c47da6b2f6b7024c225cad668bb81ab2f362b684a2446bae1
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://maypoin.ru/wb?keyword=bluefin%20tuna%20report%20san%20diego PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5fdb3bfb07c81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5ff34fa41c13c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5ff6690444f44.pdfIn PDF document text
    • http://gozatelaji.22web.org/free_loft_bed_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_602055eb9ae56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_6025f065abf45.pdfIn PDF document text
    • http://rababugizegir.22web.org/70990279888.pdfIn PDF document text
    • http://vuxokiwi.22web.org/37844632202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478408/normal_5fefb96a45df3.pdfIn PDF document text
    • https://pirizujimo.weebly.com/uploads/1/3/4/4/134454944/5532507.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420760/normal_5fcb054bea7cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382208/normal_5ff62e75b8926.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/vofadoloves/minecraft_pc_tlauncher.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/give_me_jesus_sheet_music_moses_hogan.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/dojiweg.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_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 5260 bytes
SHA-256: 3443da44c3bf564ca337ec3e063bf619bded28dc5ce6bf34ce6cc665c8e33005
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 11824 bytes
SHA-256: 4d90ed26c737a2b9cfc62d90dcb2f8a7ed430ccf7297693a4b3d544c540996af