Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6e9263801b5c77…

MALICIOUS

PDF

56.4 KB Created: 2020-10-16 06:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 43e26bd7f273bc4612ed02849b481d95 SHA-1: 1709a3e2157004ad675ddd35c5c5d00260eb4b4c SHA-256: fe6e9263801b5c778b331a79f3c966d956779df344fec79e2bd2db352d58cb91
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=stealing+fire+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f874acac9ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f879e33d50f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f874364e1e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f876113620b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f889c295df56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f879eb41b3f2.pdfIn PDF document text
    • https://site-1041384.mozfiles.com/files/1041384/xawaderatosumasunonupenoz.pdfIn PDF document text
    • https://site-1039899.mozfiles.com/files/1039899/88520048263.pdfIn PDF document text
    • https://site-1039563.mozfiles.com/files/1039563/82506582273.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/21038981318.pdfIn PDF document text
    • https://site-1041768.mozfiles.com/files/1041768/mazekegedoveginikidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f87485c649ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f87ba62e8cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f87f0770516d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0076/8930/files/frases_en_latin_sobre_el_amor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9002/7703/files/wijuwuritubel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/22919020972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/minecraft_the_island.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1258/7171/files/29435075496.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_off0000919b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919B 5016 bytes
SHA-256: c00e5316f7fb6c252a5f69b5dc431f23cd56ac7fee442f4816aa95c2d228ea99
font_01_sfnt_off0000a2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BE 10192 bytes
SHA-256: aac923c8c2b0227e36d622a250b1858d300660fbaa5aa7a98d809cf57ad4f4e1
font_02_sfnt_off0000c5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361