Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c0a974a2d77ffe…

MALICIOUS

PDF

63.1 KB Created: 2020-11-09 17:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 92320efa4795d0ce082e739ab83bec14 SHA-1: 16abb9254be483fa0ecf74e611a1c15cfe8805a0 SHA-256: 65c0a974a2d77ffe44f05446096b24cce71fc36d8bf4a5546e87fbb21fafb89b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/aws?keyword=foreman+house+md In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_5f9c64c8bc117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f89347d903f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5fa864efe22f0.pdfIn PDF document text
    • https://sofusosixep.weebly.com/uploads/1/3/4/4/134493363/suteredebano-vodud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bfe426-15b0-4aad-bff2-901c8053ca1e/soccer_on_sunday_book_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ce73b6-2be0-4270-8187-cfa1db530499/como_editar_crest_de_cl_l2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc5131e-1525-45f1-b73c-b7aca39f707b/rigotibanef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/299845aa-90c9-4c74-b71f-95b83a5ee630/78058036495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb37da3-4c36-4314-b56d-cca102d2491f/new_repertory_theatre_auditions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6482af-5a0d-485f-ae91-21a973ad54f3/10659903892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61247a9d-5dfa-476e-9725-66ca26ce58e3/29612656917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d4b702-51af-47a7-b764-77aff5d69a94/54028604525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7bfd14-20d6-41f9-93eb-d731fbd0f277/vivovibajefamumixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe8cbb4-af50-4cf1-b313-0e25bf9edf2c/xotetazana.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_off0000b91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB91A 4988 bytes
SHA-256: 31ea30486058ddf07bece057d0d9817f405adbcd976b864ccd9851dec4a4652f
font_01_sfnt_off0000c9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DC 11052 bytes
SHA-256: fceede72415fec7692f8ea199b4a12748984740ab6907525ad40239386f10914

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