Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e63b4da6efb1021…

MALICIOUS

PDF

42.3 KB Created: 2020-10-03 17:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cf070105f7f4480ffd3015de59ec17ca SHA-1: 966fc5a52dcc80d525f283108df99a03c44fd025 SHA-256: 6e63b4da6efb1021d13f4a561eca1a4481480f66d18ce3b4cd6cee8ce2789c12
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=java+runtime+environment+1.7.0+download In PDF document text
    • http://files.karmaspaceyoga.com/uploads/1/3/1/8/131856883/galaraxi_milapajo_bituwur_vafex.pdfIn PDF document text
    • http://files.manchestersteinerschoolproject.org/uploads/1/3/0/7/130775379/bojujegumesupi-xejepip.pdfIn PDF document text
    • http://files.usminiaturehorses.com/uploads/1/3/1/3/131381326/14f6080ec9a.pdfIn PDF document text
    • https://site-1041942.mozfiles.com/files/1041942/46034471321.pdfIn PDF document text
    • https://site-1043495.mozfiles.com/files/1043495/77447960464.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/1/0437/9030/3389/files/vumimaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2544/7587/files/dawivak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/sabelikixubokapak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0715/4842/files/helpful_villagers_mod_for_minecraft_pe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426937fe-ac4a-4ffb-a6f9-176a2df4b708/99694752066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c4c87a-b76e-43ca-88e7-365afcb3b812/wizilelimoviwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29616a2-18a4-4ba2-9a8c-90774b7a99ed/80613002142.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_off00005a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A61 5124 bytes
SHA-256: 45d794f8ad95c3a70436fe3ec38aac6ffdf5e23c68e88bd81c591e3f95587dd6
font_01_sfnt_off00006bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD5 10096 bytes
SHA-256: 478bfafe0ca2c49a73af35401c6b35e494c82b175e7665d8663cb3ddeda05302
font_02_sfnt_off00008e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E61 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361