Malicious PDF — malware analysis report

Static analysis result for SHA-256 372cde01933cdf41…

MALICIOUS

PDF

71.4 KB Created: 2020-10-03 11:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 847a453cbbef4525de9e09212ccce98d SHA-1: ff5da419d9d703f1cb1d72207271bfb1abdf2b89 SHA-256: 372cde01933cdf41d0d077e8f78d4d60f29cf88709bc838336d9c6cbbb167210
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://ttraff.me/pify?keyword=pioneer+elementary+school+suffolk+va In PDF document text
    • http://wonupe.leisaoart.com/uploads/1/3/1/8/131856979/c75200.pdfIn PDF document text
    • http://files.autyphotos.com/uploads/1/3/0/7/130740013/kitejepatikow-jotutijukow-kibigaf-nosun.pdfIn PDF document text
    • http://files.nbbcob.com/uploads/1/3/2/6/132681394/niwusekezuforemirodu.pdfIn PDF document text
    • http://sopanone.projectvoiceplus.com/uploads/1/3/1/8/131857920/movif.pdfIn PDF document text
    • http://gogeseduv.katiespublications.com/uploads/1/3/1/4/131453215/wupipokulawepan.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/96e9b315-07ad-468a-91cc-e6d0ae042db0/64536703989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01718a78-eb03-4f83-9dac-839ac00b3cbd/novozugafufosejijosek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a260699-1218-4995-a114-73bcd05427b5/13577459130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7542fe47-c852-4ab9-8480-9c5295cb52a6/17894237101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af0b53d-5e1c-41bd-8748-22a274bf9271/zufokukimerikelokemud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5622/9269/files/76148357685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0429/2004/files/maxtube_middle_east_limited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/melting_point_of_wax_lyrics.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_off0000cde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE8 5348 bytes
SHA-256: ac5ba5f80119884509b83239d78d8c7c09f83881d7908976d934575df0459489
font_01_sfnt_off0000dff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF8 15040 bytes
SHA-256: 9f8144ba92b707325949b5bb4d65e5749f8a03e1dd4f874ca2fcb73dabe0debc

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