Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b64fc28e0457af…

MALICIOUS

PDF

51.2 KB Created: 2020-11-08 23:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ca70496bb4bc9bce6d85e209b637d2e7 SHA-1: af38392a97642189bf1519c8a93836af72ffdb05 SHA-256: 65b64fc28e0457af1e8b6b0a205abf45c8b6308743388cee9ce7bb2e30f2c470
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?keyword=salinity+measurement+units In PDF document text
    • https://bonunobomatujo.weebly.com/uploads/1/3/4/3/134318799/tekejutelike_mumubegutalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fa1cf71a11ea.pdfIn PDF document text
    • https://velabusodogir.weebly.com/uploads/1/3/1/8/131858366/fawabip.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/regufojalojaza/72018304832.pdfIn PDF document text
    • https://zisaniv.files.wordpress.com/2020/11/38506493434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33c76ce-f534-4e6d-aeaa-8d52e56601b7/35621852521.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/35182853215.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/nedavigixevizasosufutukim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e41b7bc-6232-4492-83a7-de7bf5059fb0/44877575383.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/metro_df_mapa.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/adjectives_and_their_opposites_exercises.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_off0000868e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868E 5036 bytes
SHA-256: b8ef4dcd4d93e3bc85a0cfefee52f4e1068fbe68b1a8ae08fb74532e842efb9a
font_01_sfnt_off0000979b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979B 12144 bytes
SHA-256: 16fbda6eca19b585eb36af0d2903befeaa44d7646721ad6c5beb8bf6a77fe3e9