Malicious PDF — malware analysis report

Static analysis result for SHA-256 4138d72c7e0fd59e…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 04:40:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5e95cc6d4cb4118489e7b5aa32f1de7d SHA-1: a9d8d156292e2eb49351b9fe78f17fa670d7f8c1 SHA-256: 4138d72c7e0fd59e1cb41e6b372df56b77f1f1ad552c23073bc04fbe1688fb34
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a prominent link disguised as a game hack generator, which is a common lure for malicious downloads or phishing. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' directly supports this, and the ML classifier also flagged the PDF as malicious. The embedded URL likely leads to a second-stage payload or a site designed to exploit the user.

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.co/app/431946152/hack-para-anime-cross-roblox-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-c2-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/tiktok-free-like-bot_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-codes-generator_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_off00002fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEC 22296 bytes
SHA-256: 7c846ec9bcf45bc97350f1194f99cec2aa51869fe787b3a837e2e43bb74340e9
font_01_sfnt_off000061ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 19188 bytes
SHA-256: cf340d18efac3566167a45f306347f4ca7f4efd4a5fa14c4428de3fc53a4b3e8

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