Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b7e4584ee8bf02…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 09:55:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 338d11563afebce69ebce0c7c0443337 SHA-1: 412916309aacaaca14aa0d16910578cacc7b9f4b SHA-256: 42b7e4584ee8bf02fef9d7468723c95117f9ca6edcace4ec175f454326704e05
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 0.9980

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.tw/app/406889139/official-coin-master-free-spins-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hackers-tshirts-images_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/born-to-hack-roblox-group-logo_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/tiktok-free-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hacks-de-roblox-para-cualquier-juego_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-pool-tycoon-4-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-how-to-get-robux-for-free-no-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cheat-engine-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-instantly-no-waiting_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-crack-free-robux-robuxmaniac_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-real-feb-24-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-robux-into-your-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/do-hacks-work-with-the-roblox-windows-edition-app_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-how-to-get-free-robux-and-obc_GM431946152.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_off00003077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3077 22384 bytes
SHA-256: 9687e32e148df8d01844db0b3673fbff0e8008637059acadc61bb04b5c90b488
font_01_sfnt_off00006218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 18248 bytes
SHA-256: e2af4311d6ae554e108bc57162be2fbf4f2b9d1fcb74cec0c85fa594686723eb

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