Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d999b1cacbd7f5d…

MALICIOUS

PDF

70.9 KB Created: 2021-02-28 01:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2921e11aaf31ba5520b59e66171defc6 SHA-1: 80b069e2fbd51e3941af9043abf3585c64b3db8f SHA-256: 7d999b1cacbd7f5df4cfcef04c226625814c89b336aa7c123e968d5b06b1d5dc
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://bologen.ru/wix?keyword=chapter+17+biology+reading+guide+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486061/normal_5feb15beda2ef.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/26263327770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_6016e3736bdc5.pdfIn PDF document text
    • https://cdn.sqhk.co/gomiwopizi/8LFIKqI/flight_to_mars_band.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464709/normal_5fe0e96e3cc6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_602a87d09dcdf.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/ioGifH1/ninja_blender_hot_soup_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/2gh9Fy7/adding_multiple_accounts_on_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/JNvjhrT/5456330848.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/hhFichb/jekuduw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5feb630732bf2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pikubub.onlinewebshop.net/what_is_tcp_with_example.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA5 5592 bytes
SHA-256: 8bb8839e7b7b3c53017e588c6c6f98face2ad544618f5424c479b2e4ec97c028
font_01_sfnt_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 9888 bytes
SHA-256: 08a65f8e19c05fc0becb44bd468be2e0c133d60815ff181ba36f5b6b871b808e
font_02_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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