Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f8eb75ad7d7a69…

MALICIOUS

PDF

83.4 KB Created: 2021-02-04 15:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 04d076502820933c0778e90364f1ba24 SHA-1: 8dffcd76b9ce5e388b720522ced32146f4b5c978 SHA-256: 43f8eb75ad7d7a693a3e1f27b1c65584544893b51227da85421d0066e40d7666
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://leonvi.ru/wb?keyword=vineland%20adaptive%20behavior%20scale%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6015a8b208584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471095/normal_5fe620be2fa87.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/gNRhggj/gegasufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_5fd33170b444e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486054/normal_5feff30a4a295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_6018eda357c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_600b51fa7ccdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff019776e1ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_6003faebcf790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_5fdc0998d14c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_60183e467c942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482009/normal_5fc590d124854.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366031/normal_5ff44a7e9f418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462066/normal_5ffd6a0ad730f.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/gfX9ege/sniper_killer_assassin_shooter_pc_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 5408 bytes
SHA-256: 7586db4734953f9e73ebc5d5827feed4cb38a31e18e40b50b26a993baee5ebc5
font_01_sfnt_off0001193c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193C 11776 bytes
SHA-256: c5d17fa824b243ff4967aef9dbe68d2cd825077319f111e191952e862d56b5e7