Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9d509682d2c56e…

MALICIOUS

PDF

72.6 KB Created: 2021-02-15 15:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2e9661c45679e7c0f399bb4fc4f85438 SHA-1: 9bf384a2cf01b1bb86e2ff7dcc965c44b3571b67 SHA-256: 5a9d509682d2c56eac8478e2afcd39f85dc60c16f517a88392173780ebec2b79
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wb?keyword=how%20to%20start%20doing%20yoga%20at%20home%20for%20beginners PDF link annotation
    • http://rogumim.iblogger.org/chrome_alternative_browser_android.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/HThgrhd/chicago_greatest_hits_album_cover.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5fec7634b84a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416672/normal_6004772ae4187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_600b670dab719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5fc8b79979bec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500447/normal_60051254121c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416495/normal_60039cad5383f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490725/normal_5fed0e07c4aad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff95e1c8e3ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/begijufadi/51041626137.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/fiba_basketball_court_diagram.pdfIn PDF document text
    • http://fuxopipojuwepi.epizy.com/64422521575.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/feedback_sheets_for_training_sessions.pdfIn PDF document text
    • http://negejigudakopus.rf.gd/navoluburiz.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_off0000deb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB5 5584 bytes
SHA-256: d94de7770d4481a12e010b29e143893459186cebf1963651ac95d0b15c283a03
font_01_sfnt_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 10464 bytes
SHA-256: 74b7730624bd7f129e98bb79461a2e8a841f246c95c30feed4d2bdbd17e0e416