Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edf3887a337bea3…

MALICIOUS

PDF

44.1 KB Created: 2020-10-16 13:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 40018de992f1f229fd4daf7f6403e0be SHA-1: 50c3566a838753e3b94b9db7be14783321fe2d8d SHA-256: 4edf3887a337bea31d950b36a9dac020d6821bd64e7cc3b88c6e06603ec172b3
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=muazzez+ilmiye+%25C3%25A7%25C4%25B1%25C4%259F+epub In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f87af559efb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f87578c27acc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f8765a11ab70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f871ce18be0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f894e3f2dcbb.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/7476327.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/toripujo.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.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/450d197b-3953-4abe-a978-3fc629e361f1/46548820345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc223e55-6dae-4842-a159-64a683832e5c/magudatuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2795bd9b-d140-40ad-938a-b4473102e8f9/diradarutatimaliropixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f03fbb5-efde-46b3-87da-fa58c138f7c4/43083819144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7da83df-eed2-40e9-bb0c-1cf6462514d4/4660062412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b31182d-b6d0-41b9-aae2-ee0199b2d8b1/15667715778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd27f44-55a1-4f4d-ba0c-0914dcb0b7ce/1663869101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d138c0-a27f-4751-a9a1-9a8fb1ee8059/zuvagadexaxuzigagemeper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109d7a63-f4e8-4ff3-907d-a244c15ac206/vulakuwasajimup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608e7889-8bc1-4c3e-9174-3de41df0692a/sowazagolijupitimex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c3aa35-c9ba-4648-9ae5-811888cea71c/44158215888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec26e8b-66b1-415a-ae62-df739bf29cdd/37996334121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6765/4311/files/nupoxamivogetoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9225/4105/files/liquid_thermometer_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1055/4013/files/antiderivative_of_trig_functions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 5432 bytes
SHA-256: fdb353ed4adeb8eefa2a3fdfd69ddd76dd1ff55a3ef3bf4656bfbdcddca6619c
font_01_sfnt_off00006ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF0 2884 bytes
SHA-256: fce08cb36c02190e5234935b5ce96721ec3e58704b0a10ee1e41e1ff4ce6bd48
font_02_sfnt_off00007bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFC 11812 bytes
SHA-256: ea079b03b18239209512efdbdfb5c71165874a65fe0cbcd2f5af46c1d8e536eb