Malicious PDF — malware analysis report

Static analysis result for SHA-256 be25bf9c839d050a…

MALICIOUS

PDF

46.0 KB Created: 2020-10-16 08:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e885186f682bdb693c53822a75a76d4e SHA-1: e9b5d03cc8a491e9ea9299375ac23d37cc3cfac6 SHA-256: be25bf9c839d050a1b286f3ea47d5a01cc6e0becec1c7423be6b4f6d8d2e8e58
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/123?keyword=foliatec+caliper+paint+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f88af9ca8c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8745deb2aa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8929b2ea99f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f89061f3378a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f88c226c3536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f88ff1d4be03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8748284656b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f86f58d3b3c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f88b55811937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f88a9c5d8a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f88bf88924ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f88bf999bc0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f88cbefef13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f875e1599576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8729acc6e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f891cf0b9f50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f88ed3ec990c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f876b9e966ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8712c3e667f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f887ef3a8022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f8893a9983d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9856/9381/files/soxejisusirexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/hacked_fun_run_3.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 4884 bytes
SHA-256: 5ac4ab6b7918b768a71cf55339e1e72397f9afd1fbfe9c6b290137525af811a0
font_01_sfnt_off0000884b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884B 9840 bytes
SHA-256: 72a3fc1471537d639655feab8bf0bd147a64f6c9e3cc864911099f2095b9df53

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