Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc1ec177b3ce5c0…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 12:31:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 543a9a041f9ee3d838153f0b03e4fbbb SHA-1: 17aab4eef429ec48d773b37a39e9482ceadfb0dd SHA-256: 5cc1ec177b3ce5c0c8d62e64ec05c66f3dd618f35c5bd7f3a750457cea9e6023
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 0.9864

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 https://netcdn.online/app/479516143/hacks-for-minecraft-windows-10-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-script-hacks_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_off0000547e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x547E 25084 bytes
SHA-256: 5478d17a47c4fb2f0f00d80f10c2ff5ef80b4973b6c38e845bb5faf6c6c3b5ed
font_01_sfnt_off00008d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D86 18696 bytes
SHA-256: cd39c091a68a2846e65319e0aedb696a747600c4d9ed3e222f28c6d266d57a0c

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