Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f46d24c507e71bd…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 17:26:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9bcc6988fe62c805a4cdba8130b1be47 SHA-1: f0e23baf91d9039f5eb2eaf55733f7611d3d1672 SHA-256: 5f46d24c507e71bd473ed8fc82f9b7c9cdd9b518941d5d664b97df8a04bf4e88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs and a prominent external URI pointing to a download site, disguised with lures for free Robux and game cheats. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it being a downloader or part of a scam. Although no scripts were explicitly extracted, the presence of embedded URLs and the document's content suggest an attempt to trick users into downloading and executing a secondary payload.

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-robux-no-human-verification-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-io_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/does-cheat-engine-work-on-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-trades_GM1094591345.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/fake-like-roblox-online-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-free-custom-shirts_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hype-dance-roblox-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-club-in-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-songs-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-lumber-tycoon-2-money-hack-script_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/speed-hack-assasin-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-on-coin-master-app_GM406889139.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_off00003065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3065 22252 bytes
SHA-256: 5a109c1e2125c175cc06a7365b6bfd648661df709f5a6dc72bf72aa38878a7b5
font_01_sfnt_off000061eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 19336 bytes
SHA-256: e243cfcdc54e382fec4f8f21d925e3da2d85a56f2aa27bb221d3bf3adc5c4862

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