Malicious PDF — malware analysis report

Static analysis result for SHA-256 4820b381ee56e011…

MALICIOUS

PDF

70.0 KB Created: 2021-02-21 15:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ee888c7d6475d929ba9f5418e914ec85 SHA-1: 47756aae2c2b49fedbae0c97a5ab7e5e875f6f00 SHA-256: 4820b381ee56e011c5d8036c833ab1dbf240d030ace134e3d535310b465202d7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://yafferge.ru/123?utm_term=hp+laserjet+4050+series+driver+windows+7 In PDF document text
    • https://cdn.sqhk.co/wujejelot/f55aOnm/84625085898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_6014819d7c007.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/cubZxtv/hd_screen_recorder_video_recorder_xrecorder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5fe73ac486ae7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380876/normal_5fdf7008f2779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_5fdd77aa04139.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/5631403059b8oqv.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/sv0jhW1/zombie_mob_sniper_3d_android_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fd0420a7caac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418788/normal_602b00181f443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5fed5fbcb7f34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifazafodig.rf.gd/lajupaliwuwudakidena.pdfIn PDF document text
    • http://tapejufujol.epizy.com/worship_house_project_7_album.pdfIn PDF document text
    • http://kifozelig.epizy.com/h._s._c_exam_mark_sheet.pdfIn PDF document text
    • http://gifibulilak.epizy.com/hotstar_app_for_android_old_version.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_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 5576 bytes
SHA-256: 8aa5768fcff80d485ffbf3b78800e9b0961793bbc6acea5a714fd9c6c078cab7
font_01_sfnt_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 10212 bytes
SHA-256: cb9227dbdd6a69a401ae42fc35cf57026c1bb82f5a0fdc100d65b3b8f1772a89