Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54a25a2cf846482…

MALICIOUS

PDF

39.3 KB Created: 2020-10-01 22:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 110a9c80f5832c85ff8c6172acbcb9d3 SHA-1: ef8766ca0fbab231cf30c87ca9f22f5b11ccc14f SHA-256: c54a25a2cf846482676304fc861d1370462e2119b88b04fffbb29c76dcd8e211
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://gettraff.ru/strik?keyword=wilson+2020+hardness+tester+manual In PDF document text
    • http://fuvuz.efarsystem.com/uploads/1/3/1/3/131379730/1032643.pdfIn PDF document text
    • http://daxera.whitpeters.us/uploads/1/3/1/8/131856374/zagananejodeza.pdfIn PDF document text
    • http://mutozopiw.danawensley.com/uploads/1/3/1/6/131606457/6834412.pdfIn PDF document text
    • http://zurudab.mail.abelpena3x.com/uploads/1/3/0/8/130814297/9908308.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/1/0464/6597/4440/files/free_evinrude_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3015/files/power_wheels_raptor_quad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/7_valence_electrons_in_chlorine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/ap_stats_exam_2019_scores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1442/2169/files/45600846850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91055078-225a-4434-81a9-ccca84439925/54117687537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01066cc6-4f71-435f-ac16-3e6c4049a6af/58080342164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1038/4295/files/prime_or_composite_worksheets_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6587/9965/files/jezitog.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_off00005a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A78 5352 bytes
SHA-256: eb53808bdf56932891fb1509332c06dc1856827644de57d4308f2f5c94bbd3e0
font_01_sfnt_off00006c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C89 10984 bytes
SHA-256: b5fe030eaa80e9c160e4c16abc98bc50e320156b69c8f74fbc82ce525a3a370a