Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdf1bb0a8b34b47…

MALICIOUS

PDF

45.0 KB Created: 2021-06-10 22:13:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9fc26c4caba552e7d533e69b69de9090 SHA-1: 4218a5a4030d3adc196d922123c5598c58444392 SHA-256: bcdf1bb0a8b34b47ef236907eee8ae01df4d2e24ca79a2b3fb2c4d5304a6b544
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a malicious redirector disguised as a 'Roblox Hack Download'. The heuristic firings indicate that the PDF links to known malicious infrastructure and is designed as a lure for game-related cheats. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-hack-download-pc-2021-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/cheat-engive-vs-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-tiktok-25-likes_GM835599320.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/wings-image-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/cheat-engine-for-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spin-link-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
stream_004_off00004fe3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE3 25152 bytes
SHA-256: c1e9fd1d5e6bc691ef9225513ca0f19a886378a7ac97bc9cdb38bb56cd278587
font_01_sfnt_off00008a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A32 19244 bytes
SHA-256: f851a0ace6e8fd11bdfaad448561bbd1ed5de43f46cd671b059433d6bae81533

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