Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d826d9724a33df…

MALICIOUS

PDF

40.5 KB Created: 2020-10-30 05:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 24e3aa03f598ab7e9d496b456be03408 SHA-1: 5e5214ab89e80ce403e8ddc874154c699df3ad49 SHA-256: f0d826d9724a33df8ae9c5d3d0d653c75f41c9d6f46a1e48186047bb40eecf9a
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://ttraff.cc/123?keyword=careers+board+game+1992 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f89136ec406e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f91598b5fd67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f8c46357d827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f86f9a93e418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f992f9d35f71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f8d6a5459825.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/lixuduwonifa/the_devils_arithmetic_novel_unit.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/le_gaspillage_alimentaire.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/kixivu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/79537720147.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/jilalolilife.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/absorption_chiller.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/xoxuzidekivis.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_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 5496 bytes
SHA-256: fd81085677d025afd97ee23fe5fac2847685a3f433edd58ea5494630cf1d43e5
font_01_sfnt_off000071b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 10464 bytes
SHA-256: 97625799c2baee157efdd23a7cf2fd0e3485ed176032c16d59a6326cd90425f2

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