Malicious PDF — malware analysis report

Static analysis result for SHA-256 5986e1f812253c77…

MALICIOUS

PDF

43.3 KB Created: 2020-11-08 22:38:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 67ae5b4754224a4b99a9b99dd25fa0d7 SHA-1: 2216cac44ef66e8a0c852de05ef221a472a60157 SHA-256: 5986e1f812253c77005dec63b5fdde13f996f3d17076edd92902f43517eac0ac
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffe.ru/aws?keyword=logan+streaming+vo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5f9cfbf4762db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f945f052c6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459469/normal_5fa2fc608cd6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sugadoden.files.wordpress.com/2020/11/35251723769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0819715-cd3a-410d-8896-4f3f371a7fe5/10923878565.pdfIn PDF document text
    • https://dututired.files.wordpress.com/2020/11/duregepusewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676b59e9-817d-456c-8b06-d17d1a514955/angelfish_eggs_stages.pdfIn PDF document text
    • https://rezexisikup.files.wordpress.com/2020/11/90645809648.pdfIn PDF document text
    • https://zuwumatola.files.wordpress.com/2020/11/fowosodilobulikit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748d5605-632e-463a-b433-ed10766f09a4/bytes_object_has_no_attribute_encode.pdfIn PDF document text
    • https://dedalepu.files.wordpress.com/2020/11/basarab_nicolescu_carti.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56D3 4976 bytes
SHA-256: 9d50950714ca6da98e3aed4d10d0bbff8b36ec944a9c992f2a0ef82abc5a5557
font_01_sfnt_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 10556 bytes
SHA-256: 846ef7dbfe125c87bd1b0d53e61acbf48d89014e73478321cea66e5bdd0f100d
font_02_sfnt_off00008be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE2 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848