Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ca15e510dbbe84…

MALICIOUS

PDF

39.0 KB Created: 2020-11-05 21:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 66ebebbe535142c324c8450c36815d99 SHA-1: efc09c9b17901d2173f0dacbc973139038943d52 SHA-256: 04ca15e510dbbe846d6af6d6e3fe4c8752bc20494f0b8a2d4bd90bc87c2af012
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://trafffi.ru/123?keyword=catch+22+origin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f9003cdcffdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_5f9a5106bb636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f8863e228f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f8af448a0105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f95b19b7dc21.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/zalomi/latitude_7490_spec_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96bf924-34cf-4852-9d1b-eb3f8c675e36/fusobiwiwewupibitafusaso.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/65613296201.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/vipinixujoredisoriru.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/82222305631.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_off000059fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59FE 4888 bytes
SHA-256: 975b0673322c05b6f879400a7f27c661f99a55f023df5a20ae9b6b60403ccd4e
font_01_sfnt_off00006a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9A 11020 bytes
SHA-256: f62f8f8a56c321aa3c77c390a2e1f3fc1492a73b5095e60f0bdaa28643ed823c

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