Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1b81c12e96e861…

MALICIOUS

PDF

73.4 KB Created: 2021-02-07 14:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 80247f7e2b0d5c5afa4324cc8c0a78a8 SHA-1: 036946e4257746e2cb13900eb5f98f3e39cb8dbf SHA-256: 9a1b81c12e96e861a43db26b88e73051f421b5efa9d45fda569e914112c22d8e
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://jottigo.ru/wb?keyword=benefits%20of%20using%20technology%20in%20education%20pdf PDF link annotation
    • http://xufunuduxatene.iblogger.org/arabic_keyboard_language_for_windows_8.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/hiibHsb/gofatupideliteror.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/VJrT7YQ/dungeon_defenders_2_defense_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/iinhhgj/2548389851.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/iijjhdR/80950693071.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/7hejfhb/rorom.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/gh54Zjg/smash_racing_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/i1ideaO/atlantis_odyssey_game_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kujavuven.epizy.com/nusexizipo.pdfIn PDF document text
    • http://zisekajoreva.epizy.com/browser_not_working_android_firefox.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/sulefozijefajujawobowu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/verbal_pronunciation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/and_install_cmake_on_windows.pdfIn PDF document text
    • http://dufexupomom.rf.gd/83444040883.pdfIn PDF document text
    • http://fepefemed.rf.gd/pre_commencement_site_inspection_report_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 5472 bytes
SHA-256: 0890ff3288ce9982f79b89fb9613f890e8d78ca28ad783fe03fb0bde572b9890
font_01_sfnt_off0000f62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 9988 bytes
SHA-256: 5ec9fd1aadf128bc8b3b874bcccdf1fe23e02b6088bdd257e80c686d5ee5012e