Malicious PDF — malware analysis report

Static analysis result for SHA-256 635232085fccc53a…

MALICIOUS

PDF

71.7 KB Created: 2021-01-23 16:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e6c1997ead3349c39d655742aac6611c SHA-1: 02fabdb972c1ca3f19a1ded69208234c69c0668f SHA-256: 635232085fccc53a5f104e02af4331db12acc6858654999691dbe2518ad2db8c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/wb?keyword=bombay%20house%20near%20me PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5ff24c4892dbd.pdfIn PDF document text
    • https://nodemudikukurev.weebly.com/uploads/1/3/5/3/135348567/ea20504ea69d27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391636/normal_5fc8e2b8f3f09.pdfIn PDF document text
    • https://cdn.sqhk.co/pugusomimoro/0tqLkJz/lugugifarivukijaradonex.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/fNiepsv/lubibazozoribam.pdfIn PDF document text
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/doxeza-funupesu.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/djbZUjg/xovazogiwosaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/lexewagoz/NhjheoL/setaretoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377938/normal_6004794bdb223.pdfIn PDF document text
    • https://zofenegug.weebly.com/uploads/1/3/1/6/131636866/5325102.pdfIn PDF document text
    • https://site-1248593.mozfiles.com/files/1248593/87353868619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394077/normal_600589127edf2.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/jecgdib/galaxy_alien_shooter_pc_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5ff12ff3f131b.pdfIn PDF document text
    • https://site-1202168.mozfiles.com/files/1202168/crossbow_master_3d_mod_apk.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_off0000db51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB51 5184 bytes
SHA-256: a0fd9be75da750708551603b674aabe661b9b1f57f4cb9f457d9cd82c40c859c
font_01_sfnt_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 11068 bytes
SHA-256: b37119ff8730b6caa685b75b547177b5f62c710966acd2221d0aa494d647772d