Malicious PDF — malware analysis report

Static analysis result for SHA-256 2808037c3782c817…

MALICIOUS

PDF

55.9 KB Created: 2020-10-13 13:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: bd1d0ddd138093985a5ad381b383b2c3 SHA-1: 74ba31a0502f607cb565b5fa380b0db5ba95d5c3 SHA-256: 2808037c3782c817cfef26bf98c330ba7266b5c02dc771f1e3998cc63383b4f3
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=toefl+pbt+preparation+materials+pdf In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8276696.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/8430b282-c72f-4876-a946-54e8b8f82f32/pomajopegumojitow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31cdcfb-3636-420f-94ec-939acf438eb5/muredarirurisigal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3119baa-be55-4059-b12f-2b65f7579b55/jusik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd78d60-160b-4e6a-9806-9c9b0e10761f/26636606836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf59330-9b47-4f15-b9db-08af53f3a7f8/18903843747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad7935b-4b4f-497e-bf1d-d0a85fc8df64/pijupegika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f53320a-fe34-48b5-816b-432cdacd750d/24788020836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad76dd19-014e-46b4-a835-4bc3e74f4f73/gorufinagojamema.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000852e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852E 5064 bytes
SHA-256: d5fe41d8f12e67dd48f8154790420d8560232473f7c65053784163f20455ca3d
font_01_sfnt_off00009631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9631 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00009ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBF 10528 bytes
SHA-256: 707ce9bda24312c61664e9afaf5ccaabfb67b829af3cdbebd4aec0b7ec6e5995
font_03_sfnt_off0000c2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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