Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca2281af241933d…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 16:36:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cfde7c61e998b75692d6dd412e6cd553 SHA-1: 225d859b87bb5503cdc206ff89e9b52eeda40e6d SHA-256: 4ca2281af241933d85c092a64fe0c97480537895290f3f863b46694cc6f53b18
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 0.9984

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-glitches-2021-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/serveur-discord-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/black-clover-online-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/vehicle-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-codes-generaator-roblox-no-fake-no-verication-human_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-accounts-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/best-free-troll-avatars-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-shirts-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/promo-codes-for-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A8 22348 bytes
SHA-256: 522da03d0be59856a38b40acf4c04fe6fd25ba24e51f4fc1a3508c2a70bfe3ac
font_01_sfnt_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 19580 bytes
SHA-256: 2102696404b9b92ee76359def4596fd9c12c8b4faea783ff326df15ce168e6b6

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