Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a1a03983db9071…

MALICIOUS

PDF

34.7 KB Created: 2020-09-30 11:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a82e02e9e5d3f85db76941b9dfc9a993 SHA-1: b3bd39456ce508d4fc3938f6e9d3c29dac6dcb6f SHA-256: 51a1a03983db9071ec222ba7e19e2cfc3a5b87b40cded0e27939257babc23f2d
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=basic+bill+of+sale+for+car+pdf In PDF document text
    • https://site-1037279.mozfiles.com/files/1037279/ximedevewajojexosoxo.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/kozezotupufebudap.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/medoxibugukidubebu.pdfIn PDF document text
    • http://wokozaw.clonmel-acupuncture.com/uploads/1/3/2/8/132815758/xiboraxame.pdfIn PDF document text
    • http://files.compusoftcanada.com/uploads/1/3/0/7/130739322/tasupenamifejisu.pdfIn PDF document text
    • http://files.thekatiefoundation.org/uploads/1/3/2/8/132814348/5874788.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/5646d024-f1b4-4ed0-b07e-28cdbee4c377/51932665960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/22901157293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/ansi_150_flange_dimensions_in_mm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/levaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1152/1187/files/perimeter_of_a_semicircle_worksheet.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E6 4940 bytes
SHA-256: 2f96855b093be79274a758219b3ecd827d7730b84ab5f8cf7b07f398069671d3

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