Malicious PDF — malware analysis report

Static analysis result for SHA-256 78464dfd2576477f…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 23:48:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dacf753bb5f61f101c720818f046c1b2 SHA-1: f36c2897b6bdc5c049583dd61bd6dc0e57822bdd SHA-256: 78464dfd2576477f99927a122c062e4f2fb5d314875c8f55a999562b80af356f
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 0.9865

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 https://netcdn.online/app/406889139/coin-master-hack-no-download-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-avatar-free_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
stream_004_off00004f94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F94 24088 bytes
SHA-256: c34988aeeb91dd8af3792daf291256cd5ed03d475f55f4c6ce7021faa7bc3ade
font_01_sfnt_off00008692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8692 18296 bytes
SHA-256: b5e07150b2161f53c53a5a0ecf5e7f42140b65a1732b8c9e08245fa4e84c8ce4

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