Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e5cab2c9796c62…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 03:19:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 93593fa9895b6129e7ad83ef331d21b1 SHA-1: 4dd82b0e97a70f8ddfa147a82fc552ef6f32ff6a SHA-256: 87e5cab2c9796c629df571e33777c5045f150c60b41e925024fcc1b32cb489f0
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/earn-free-robux-website-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacking-become-admin-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/can-you-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/tiktok-free-recharge_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-in-robloc-for-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-coding-guide_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-headset-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/city-17-roblox-token-hack-dll_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-make-a-skin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-free-robux-offers_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-unblock-roblox-hack-a-wifi-password-on-computer_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-2021-september_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-apple_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
font_00_sfnt_off00002f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1A 21596 bytes
SHA-256: dfcbeb44bf50a31da884531787971e92900701350379710f01685e94b7e3ae6c
font_01_sfnt_off00005e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E89 19136 bytes
SHA-256: 6e1c21e6704019cc35f83e3762b6283ce00a6d01d3f646bf8d77284d38dd9f10

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