Malicious PDF — malware analysis report

Static analysis result for SHA-256 251004c511d3af69…

MALICIOUS

PDF

77.3 KB Created: 2021-03-08 08:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 84b1cb6f0d48ccbf3ab72c7b5c6fd9fd SHA-1: a2a55b8291a8eabda99289169995d7a6427de7db SHA-256: 251004c511d3af697441d41bc74f40c8eb1339dc0f188c553ec82c633418eae8
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/award?keyword=best+way+to+transfer+mini+dv+tapes+to+dvd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473359/normal_6009684c36d27.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/23755997450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408335/normal_601959190d54a.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/QHgvpgd/84646339006.pdfIn PDF document text
    • http://construt.site/short_stories_for_kids_in_hindivpzy0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5ff1351a78616.pdfIn PDF document text
    • https://cdn.sqhk.co/rifebonapesi/gcWIBvn/18908784827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_60323860318dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_6020b74581e2a.pdfIn PDF document text
    • http://cardioactiveuficiale.site/bujiradijetotegabodadijv430e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383445/normal_600210cc4cf3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485173/normal_5fcc003028274.pdfIn PDF document text
    • http://greatholl.com/56995054021rmyd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5ff711a7a15f0.pdfIn PDF document text
    • http://ingmijn.com/4586231317spgup.pdfIn PDF document text
    • http://milanbeachs.space/fetemukilk7pp5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379611/normal_5fd0557c81947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/munabonoruzafapara.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_off0000f1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B7 5460 bytes
SHA-256: a1f6c25b6ce8fbcaf83387ad2212b09cacd336c19b1a669e4706666ae1ce8fd0
font_01_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 10412 bytes
SHA-256: eabe5e06d24e2a23f0a4530eb73ed6d03cd1ffd997b3f04e92b34f0f03cb91ee