Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e79bad7a69c5d7…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 12:47:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ced1df06b487df3114705c7e4b59839a SHA-1: 45d625906556e8745be87924815a4956960aa1cb SHA-256: 86e79bad7a69c5d7b8d87fab52c04155bab1ebc08a849324a1c7a08665a96a04
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed as lures for game hacks and free currency, specifically targeting popular games like Coin Master and Roblox. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may attempt to solicit sensitive information such as private keys or passwords under the guise of account recovery. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-daily-free-coins-link-game-hack, which likely serves as a landing page for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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-daily-free-coins-link-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coin-master-spins-2021_GM406889139.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_off00004d0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0E 24816 bytes
SHA-256: 8e4fd345578ecefff10d88e7a0535e5f4078bdb92c9a280abdc4a038ecb8af97
font_01_sfnt_off00008570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 18304 bytes
SHA-256: b2c10786a2ef705dd5d89e60f64d684b08d5fff845b0f0c55a2f5e2f1760b4c3

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