Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc37e70b2bec010…

MALICIOUS

PDF

33.4 KB Created: 2021-06-26 22:30:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fb167aee583c7bddd6c6dac2926340b3 SHA-1: 14bf4f72200d94cea09444a3a5d97b301969acdb SHA-256: 5bc37e70b2bec010305fd051cbb2319b1307c2fe4c01e29d0a6f80f1db82f41d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.co/app/431946152/free-robux-generator-no-human-verifacations-or-downlods-to-chrome-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-hashtags_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/descargar-roblox-hackeado-para-android-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-hack-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheat-codes-for-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/100-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/the-streets-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-2021-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/survivor-hack-scrip-t-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-highschool-hack-script-pastebin-money_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pastebin-free-robux-hack-no-wait_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-buy-promo-items-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/slerp-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B91 21568 bytes
SHA-256: bdb712bbe35a516a8dca591e6849a4c2ac531c9678a3389d1b7ea1ed1685efd5
font_01_sfnt_off00005ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB4 20080 bytes
SHA-256: fd3ed81381f76948cef0fdc46f13a3b29a2940fdf41fc7b2622ae44a15430cfa

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