Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b5bf505b0e97bd…

MALICIOUS

PDF

78.6 KB Created: 2020-12-25 20:38:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 5452b7a22e49d988883a855f7966cbb9 SHA-1: 94c72cd61af58f7a82029d7c080500c17d72b790 SHA-256: a8b5bf505b0e97bd734015c3cda68a71bf7fefa2b0dc631271ae3c7ddbf94a5b
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/wb?keyword=stickman%20and%20gun%203%20mod%20apk%20revdl PDF link annotation
    • https://s3.amazonaws.com/kulinisokakewi/chemical_formula_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/jcAuDia/us_pacific_time_zone_map.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/dakota_middle_school_eagan_mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fd1c15ebe433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5fa1821aed68a.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000df62.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000df62.bin)
    • https://uploads.strikinglycdn.com/files/d388333f-6dff-4ddc-8c7d-71e4cc221b9c/84760914133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33068096-6296-4324-8490-309bd329b62b/89514906774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3a9b2e-c833-4a99-829f-960a4180f633/gunopifowerelogoreleje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d85581-9776-4cb0-953f-e4285d3b3161/vexikopupijejuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12baaf18-aac1-4757-9803-2f999f87c176/36699040623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c024305-b309-491d-a401-41121298d815/kenemogag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c1bad3-5286-48bb-ab3e-b114d23497ed/polar_m430_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7349c700-b098-425d-84fd-89fa430feab2/jacob_lawrence_migration_series_panel_1.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 extracted file (font_01_sfnt_off0000df62.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_03_sfnt_off000117b1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_03_sfnt_off000117b1.bin)

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 5604 bytes
SHA-256: 43bd3e248e5d90bb8bcc4fa6adf2021cd1a23b7aa4954ca6fd60b4c10b05b4fa
font_02_sfnt_off0000f26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26B 10808 bytes
SHA-256: 39c3f09a48cd63d2d030ca73c3c59a408aec6db0be90c10ee32063df065cfcab
font_03_sfnt_off000117b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B1 16160 bytes
SHA-256: 25a5e6c7c9cd73e1730f271d334b71b3c0ac6385951e3737251623a68d8eef5c

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