Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6bdb50ba351773…

MALICIOUS

PDF

70.6 KB Created: 2021-02-05 09:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: dd4fe6750aabc27c556dce131feb3fc4 SHA-1: 93943f67f49d3f3d439bd8536d2e4d1cf053db9c SHA-256: 1f6bdb50ba351773d38c8b53dab4550e9eaaa1439339308cba89b09e7158e2bc
136 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
  • 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://jacksth.ru/123?utm_term=pleasant+hearth+pellet+stove+installation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411246/normal_5fdf37275c6a5.pdfIn PDF document text
    • https://cdn.sqhk.co/pegiridireva/h14Ejbw/spin_warriors_istanbul_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_5fd77b7958fdd.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/SsC9RPX/paul_hardcastle_9_tracklist.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479923/normal_5fcd726fb7fd9.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/rjfhbBE/5143878675.pdfIn PDF document text
    • https://cdn.sqhk.co/tibapopedeka/2xCvhfa/gun_zombie_hellgate_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/a5Gjjgj/derunisuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419410/normal_5ff0336c21e70.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/vofadoloves/impossible_quiz_2_answers.pdfIn PDF document text
    • http://risexogukif.rf.gd/bittersweet_symphony_sheet_music_viola.pdfIn PDF document text
    • http://sulojigemijat.rf.gd/wowalijup.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/kamonixulemidewedubile.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/acute_lymphoblastic_leukemia_epidemiology.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/cisco_switch_3750g_datasheet.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_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 4968 bytes
SHA-256: 69be06f537e2c374b7d1447bfea868d788e304209b0d47d556a29686e2e2c5c0
font_01_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 10620 bytes
SHA-256: 2bf008ffa916db4b09c5787c2b4ff982f05cbd9cb13d7b4188a00cd799fe4d1e