Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbcac2c57f01d37…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 19:55:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d401267ce55899cd9c958561e49387f0 SHA-1: efc6c68f9da21142c1723cf607a3a46d1baee65a SHA-256: 4fbcac2c57f01d37615eeb970dda42a6c4a7a235762b3e85d5ce351105713f45
122 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, with a high-confidence heuristic identifying a 'free generator / game hack' lure. The document body also contains a URL that appears to be part of this lure. This suggests the document is designed to trick users into visiting malicious sites, likely for credential harvesting or to download further malware.

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.tw/app/835599320/tiktok-free-vs-paid-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux-hack-descargar_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/i-got-hacked-in-weird-writing-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-blox-piece-script-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robloxgainer-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-guns-in-scpf-area-omega-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-account-in-roblox-biz_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-password-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-booga-booga-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/cheaten-bei-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pet-sim-online-hack-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-infinate-money-hack-pets-simulator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://launchpad.net/free-tiktok-fansIn 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_off0000313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313B 22900 bytes
SHA-256: f4a24ec179380da6c0fe005b98e4cbaa9d63b73f9ba8cb49be5ff484c89fbe4b
font_01_sfnt_off000064a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A2 18436 bytes
SHA-256: c02d4cb5ac4f7c37b80e7d7dc2113a15424286b88624eb445154f9544d140221

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