Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ec9f3dab4691db…

MALICIOUS

PDF

70.5 KB Created: 2021-02-20 07:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f55fe6981c4ec955cdf1c35989243e10 SHA-1: 20c583b504a4bb235a1561200c4405f004216b83 SHA-256: 89ec9f3dab4691db5fa871b3d75d84936f118a499a3aef938e0deed8ab0aa247
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=burmese%20days%20themes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_601facf1765f5.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/jjb73X5/51736000975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_601138adaec0c.pdfIn PDF document text
    • https://cdn.sqhk.co/pavuraxutem/ciib9he/23133940183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fd1f441c2c7e.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/ihiajcC/nigerian_praise_and_worship_songs_free_download_mp3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393197/normal_5ff37ae99a7d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490739/normal_602bd994cc829.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/zupenafud/dhadkan_bhojpuri_video_song_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/sovebegasefi.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/95504011997.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/45078367847.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/amigdalitis_y_adenoiditis.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/8_pin_din_connector_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/gaxoxemafum.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_off0000d9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EC 5184 bytes
SHA-256: e71b087f2214bdda6cbec3b4aaf82863563f867f440975c7a5bd4cc04ad3b8e4
font_01_sfnt_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 9964 bytes
SHA-256: b2d704c7cbeeea803e8eeb24ba2349058f4b3d9186cda9afbb6b3eb7e2826f7b