Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc26f261c2f7f96…

MALICIOUS

PDF

40.9 KB Created: 2020-10-02 07:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: bbeac5e7a289178ae15b526baaac11c1 SHA-1: 94590e9763025729eab5687cee39f8debb06ad8f SHA-256: 3dc26f261c2f7f962f8e7256ffefe52e34430d7b3901ca5a690d127b93292cce
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=ss+chemical+composition+pdf In PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/zomemokakile.pdfIn PDF document text
    • http://files.charpentierteam.com/uploads/1/3/1/6/131637226/45ea712955123d.pdfIn PDF document text
    • http://xabatat.michaeldalberg.info/uploads/1/3/0/7/130739478/5339176.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/1291addd-03f2-49d3-b46b-2bdb21738f21/xelajivewufimajod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322d8037-ef50-4c8d-9ad6-092fa5a98b2e/36692039413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283c358d-114c-4505-b5a5-a19778b6eded/89182912208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec971ce-7e64-4ec3-9c9a-986d0ca1e631/1089494452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b9c00f-66b7-4481-a6df-4d18a10fd6d4/wojopirodowulituzode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d0cb04-2919-48b8-9fea-83c47f402265/87679700149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb65c3e-73aa-42b3-a2a2-09224996fe0b/69651307746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3be839d-7f68-4d5d-bfcf-66a047ccffa6/peririwatukumijesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28693ef-9109-49cc-91fb-75f7dcef91b4/41076785019.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000576c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x576C 5400 bytes
SHA-256: cab22e38176d884f1c475209025fba04252ee458a937b829bbe3bfcce5c4fbcb
font_01_sfnt_off000069a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A9 14540 bytes
SHA-256: 509f02975d01ec5cd61c5fc78a9208ecb5c3855ea3a8081679b66b35d5ea1802

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