Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99c0a5a594a79f1…

MALICIOUS

PDF

61.0 KB Created: 2020-10-03 22:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b052570b6cdd538e98af02464d60c510 SHA-1: f4c5e42c7e25e93c1a4efda95c9df7d4a43e5f7d SHA-256: c99c0a5a594a79f1ecb18475e4023eb2777f73dc20dcb7c956865379fb47a827
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://ggtraff.ru/strik?keyword=neuropatia+periferica+diabetica+pdf In PDF document text
    • https://site-1038992.mozfiles.com/files/1038992/53234648412.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/wajaromawotirivosu.pdfIn PDF document text
    • http://devedime.pesfusd.com/uploads/1/3/1/4/131482916/9602127.pdfIn PDF document text
    • http://files.rosatorresorganization.org/uploads/1/3/0/8/130874244/lativigizusebe.pdfIn PDF document text
    • http://dobow.michaelspauley.com/uploads/1/3/0/7/130739192/2e66ca2e27a1.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://uploads.strikinglycdn.com/files/34dd0b55-da86-4ce7-8535-0228635f1167/75432959693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c2f4fc-b67f-4295-92b3-c0ba4804720e/84289431663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f60b8e9-d941-4a9e-9283-f4fd8e4fd848/zizetulikiginiwodofuseso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546896b6-66fe-4e2d-b3c8-c1999b42bf25/bidudukivifoliloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bb8c07-ec36-4931-91f5-bf8e784a9115/84802157829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d941862e-4e42-445d-bcf6-a582a68286d8/97420667129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311c3ee4-d00e-4f1a-bd69-0c87d196a0e1/vivujajudasojosese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7f4de8-e979-430f-8c5d-463765da95ee/difazijurib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563af5a1-aa2f-46ba-aaf6-7818b768ce53/32089267992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9698f42-3f86-43c9-9c98-d4f3248c0711/17998732940.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA520 4824 bytes
SHA-256: c1f7f0c13e27cde9716f78ae1ed8bdedb223f7e2993257ac8b98f43df8f001be
font_01_sfnt_off0000b596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB596 10376 bytes
SHA-256: d9242412bb705b060b6431ced63c3d4a13908bfd28d7924de73a74ad5590127b
font_02_sfnt_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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