Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c672f9eb6321779…

MALICIOUS

PDF

66.9 KB Created: 2020-11-09 14:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c9ba83765d3549a7cc39ddeefc2846d9 SHA-1: 909c76aa1000b9935b4044559f69ce7a05d929f8 SHA-256: 9c672f9eb63217797c11c41c33feb833e5f607b1a4753bddd2c4e0b88ec9b127
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://trafftec.ru/aws?keyword=sony+icf-cs15ip+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5f98746a75287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5f96eaff06555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5f982463e50c4.pdfIn PDF document text
    • https://zobovakobazazu.weebly.com/uploads/1/3/4/3/134319401/wasel.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/talivosevun.pdfIn PDF document text
    • https://nuvofuvulaxak.weebly.com/uploads/1/3/4/6/134694516/voramesofu.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/pedekemuganosimuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b613664e-0172-494a-bab9-69b48ef2fcb1/xagepikexobafiwam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b728f0b0-927e-4732-82d7-cc2d56624839/nothing_gold_can_stay_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18162301-9222-41e3-90f5-b3733ad9abda/jimatebasuretaxona.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/dijiraboligimokun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df73885e-36ee-4e0e-b59a-9f7af5fcf3d5/18326029609.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9709 5164 bytes
SHA-256: bd23235f5e68abf5a49d622e67deb8aab9e59d80779aab2cc0b6df5666940dd5
font_01_sfnt_off0000a883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA883 2420 bytes
SHA-256: 792de13cec49ac39125921c4bfc8ab3eb6bef27a0ac55b072636848f45887dfc
font_02_sfnt_off0000b2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D9 10744 bytes
SHA-256: 1e5227511d001d86bad7633685772ea9ddf63dc4710a861cd181d6958ab78bed
font_03_sfnt_off0000d7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BE 8156 bytes
SHA-256: 770fe966c266086ce3bad2cbce8bac25300c573c0465830d5e9ea20566e51091
font_04_sfnt_off0000efc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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