Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99489c705c12134…

MALICIOUS

PDF

70.2 KB Created: 2021-02-06 22:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ec4bb609472e773a1dfef6c8ad3aad70 SHA-1: 6f84fa9190d3798cce637accd8bfd60ce1daba7c SHA-256: a99489c705c12134cecbbcbeaf1d0f836ff825ae3a5b4b4706b89b37dfa4ba03
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=cash%20flow%20sample%20questions%20answers In PDF document text
    • http://sdfsdfsdf.shaketorch.com/2025421106.pdfIn PDF document text
    • http://soinjaga.ru/tibatidevv4xxa.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/8hhigji/59219645839.pdfIn PDF document text
    • http://4escam-bot.online/cracked_offline_android_games05adf.pdfIn PDF document text
    • http://mebets.xyz/wajilar54tbs.pdfIn PDF document text
    • http://dedokomaweza.22web.org/lurozegaxexuvive.pdfIn PDF document text
    • http://shopsupergood.site/collections_book_grade_8_answer_keymaup4.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/Qgfjiie/julebumatemirewudisej.pdfIn PDF document text
    • http://onlinekartiadesi.com/lenovo_g575_wifi_drivers_for_windows_7pu0oo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vemixizafij.rf.gd/17783249947.pdfIn PDF document text
    • http://molodetagako.epizy.com/ximasuje.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/neuralgia_del_trigemino_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/bal_krishna_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/gapexironoropi.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/81127340833.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_off0000d4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BA 5264 bytes
SHA-256: 1fe28a8a10d5e7852ea6ed382868ade8aeaf638225f9aa5c41df3e092e356f46
font_01_sfnt_off0000e689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 10944 bytes
SHA-256: 271732846967410fcf0be7b046a28e4f43569bb039141f19408e7f0309ba8361