Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e73698cd060027…

MALICIOUS

PDF

37.5 KB Created: 2020-10-09 15:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: db8d985fcd286b68c0da9cc89ef20e4e SHA-1: 256b8d2a8de0435b74cbf0bfe236cbffd99e625a SHA-256: f9e73698cd0600272d1bb5ef14669c65c409d6ce1a87db83d2b5d7bd9811cd47
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://cctraff.ru/strik?keyword=6+oz+flank+steak+calories In PDF document text
    • http://files.matthewbarbee.com/uploads/1/3/1/4/131437680/5cdfe.pdfIn PDF document text
    • http://files.teeswithpurpose.com/uploads/1/3/0/7/130775825/5691659.pdfIn PDF document text
    • http://files.dbtdelaware.com/uploads/1/3/1/4/131406108/73fc9f955.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/8163a480-2268-4e46-a118-1768af64b2ab/vokiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561d1d00-b373-4f47-b2ca-2c1aad3b8c3a/91145478452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a247a9-45d2-4870-8f7d-d96c42098a53/sefale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bc4ffe-8bc6-414a-afff-f4b89ca469cf/fuburesojiwajugutanud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa86063-d81b-4a2d-bf1b-75a14c418b57/zibetokuriw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa24ee8-6207-4839-86db-7ace2016b744/56796430186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769bbf95-55a4-49eb-9073-0fbaf662408e/99810282315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47cb1f8-fbe5-4363-a987-f1ffee3ee598/57093592807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c8d6b0-b4c9-4bc0-9a07-f53993467eb2/monawaruvowavozimixuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1793/2437/files/2198531967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/pit_n_peel_hours.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000557a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x557A 5048 bytes
SHA-256: 7fdaff9b57cc8c1d3423200b631a06107d0669fc5ad15eafe780d19940b298cc
font_01_sfnt_off000066c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C2 10260 bytes
SHA-256: 8c534ca330d8973f7083aa5d662e0b907e638d64ed48c22f6178ce56cfee2d2b

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