Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d8a12d2b637666…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 14:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 648a400be6768f2501c8dd80e117da06 SHA-1: 03f120ccfe8b0a74fdb587ad9d98bc4c46d886e0 SHA-256: 61d8a12d2b637666b7d6bb34f95553e63b84369212a770fca10a67b7ec367162
102 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though heavily obfuscated, contains references to 'Roblox Hack' and the same URL. The presence of a visual download button lure and a callback lure further supports a deceptive, malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/kuso-icu-roblox-hack-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/tiktok-free-hearts-apk_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-gift-card-for-free_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_off00004f41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F41 25944 bytes
SHA-256: 86a26c1b3f64df16c23512d30473e5c70d327577016a1c22d22a19c744b7e17b
font_01_sfnt_off00008a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A15 18320 bytes
SHA-256: 67b96beca271d5ff8db6d4205f4bcb305d403275eb03eb731bd8bb208d3be0d2

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