Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2141bdab8d7b046…

MALICIOUS

PDF

71.9 KB Created: 2021-02-24 12:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dd9cdc660d387b59b1422b6a0003061c SHA-1: cc60f0d615f80549dfa53e399d9bc5f5525c2e0c SHA-256: b2141bdab8d7b0460e5cc89e74345511f6ed9cf806d2f37e9638548afa7a00a9
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=olympus+om-2n+instruction+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415544/normal_602e9a4c80bb9.pdfIn PDF document text
    • http://sunshop.pro/code_activation_cubase_7yvyph.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500670/normal_5ff9f3d745f50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_5fcc087e5543d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5ffd80a4e2caa.pdfIn PDF document text
    • http://klosheff.xyz/wordpress_tutorial_free_downloadpembk.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/Fjbibhc/app_launcher_apk_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/ig6oEr3/terminal_emulator_for_android_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fcfa647459a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_601dfc1fcdb0f.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/chhicig/joxenizamabivinoxudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_602b034d8ef77.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/Ijhhhje/11655937405.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/jdDNjjj/hand_drill_kit_dayz_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_601980401dd5e.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/ihgdibG/zamilolodibivisonefegurer.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/kiwopusafize/malistaire_gear_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/46266467519.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_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 5596 bytes
SHA-256: 9e8764269745da14486fa543658933b4ce3c81790169b7ad7a2708aa2f2eb865
font_01_sfnt_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 11572 bytes
SHA-256: 1276335ecf712a13bcf4774138beaf57db25ae579877c04dac14f421b2bcba61

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