Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae5599052d00bea…

MALICIOUS

PDF

47.5 KB Created: 2021-06-11 09:19:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 047250f1b4944fcbbe00ba9aa9fd2e0f SHA-1: 31430ebd97578f0838a57684f5e41191424a532f SHA-256: 9ae5599052d00bea7774ab11670002be1d2220b4722d113a7eb3c16c29949c2c
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body, though partially corrupted, also contains a URL pointing to similar content. The presence of a "password-protected archive handoff" heuristic suggests the document may be intended to trick users into downloading an archive that requires a password, likely to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/free-roblox-wallpapers-game-hack In PDF document text
    • https://privatearrangements.co.nz/public/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/master-hack-coin_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-cheat-engine-game-shutdown_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-gravity-coil-in-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-one-mill-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000525c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x525C 25172 bytes
SHA-256: 3c510229517d36c6b91da98b580be79a67aa7372230704348cadb00485cb14a1
font_01_sfnt_off00008c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C00 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9610 18552 bytes
SHA-256: 8d589030ac06515b8ef17277df6c272e951f8c3748ec40a6917a266360e6f6e9

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