Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c35507bd0b6e004…

MALICIOUS

PDF

47.2 KB Created: 2020-11-03 03:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: d776f21994ac2e523450af9be384d442 SHA-1: bec224a2bf74693b09e4ae3d6afc1b3c7c238403 SHA-256: 0c35507bd0b6e004ff4a6bdf038a876e30c24dc30da0e5ede8e12fe6ee14b9f2
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://cctraff.ru/aws?keyword=ulnar+head+function In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5fa099a77302b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f937a9335c64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f92eb273b3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f9af5bf5b9ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f982bc3722a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jukezeluf/jiho_oh_my_girl_rose_blackpink.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/17343826809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b474538e-e172-491d-ab1e-78f77636ea45/xilasa.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/punatetorulawuxuzewirex.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/immune_hemolytic_anemia.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/rinuwenufepogu.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/bailey_and_love_24th_edition_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2A 4804 bytes
SHA-256: c6644b5ea1de9ecd165f3bc8a0b3e159b885aee9ebf204bae1e537194b32cfd4
font_01_sfnt_off00007e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E67 10452 bytes
SHA-256: e541e1dbf0315947c62c2dfa35b9f8e2b9ac2af093e50d60b247c2005b8c3856
font_02_sfnt_off0000a1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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