Malicious PDF — malware analysis report

Static analysis result for SHA-256 168dcbd8b5e46dee…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 07:57:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b18360e11cf43184a2c7fa59c8b7adb3 SHA-1: f02293c883d170177a6bec43545da20fc710d8a9 SHA-256: 168dcbd8b5e46dee059b2a833b3f3f84869c7d1130f43e97e2cdf8642aa4442f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text promoting 'free Roblox hack' and 'free Robux', indicating a lure for potentially malicious downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a suspicious nature. Although no scripts were explicitly extracted, the document's structure and content suggest it's designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/free-roblox-hack-game-hack In PDF document text
    • http://library.umuslim.ac.id//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-robux-bot_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/giving-people-free-robux-live-stream_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/carte-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-fgteev-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/red-boy-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-have-free-faces-on-roblox-2021_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
font_00_sfnt_off000030bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BD 21968 bytes
SHA-256: 01a0d9af271b146ebe47fe49e717caf54dc796ad45e088e66b146440544ddae2
font_01_sfnt_off00006132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6132 18820 bytes
SHA-256: cf67562a6930539490549aeb8f0b318a0b45b3e5cb7414ef3283f960707338b6

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