Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb8cc8d27949bcb…

MALICIOUS

PDF

47.1 KB Created: 2021-06-09 07:06:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0b429b75650329e79edfaf86a9bd2772 SHA-1: 26c2ba71279b106b229abf3ecd54f267f6e43ff9 SHA-256: bdb8cc8d27949bcb94889fda14251148bd6bb37f25b1269a093e6866027b1148
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking for game hacks or free currency. The primary link leads to a page promising 'free robux' and 'no human verification', which is a common social engineering tactic. The document's structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/free-robux-not-a-scam-no-human-verification-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-do-you-get-1-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000530b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x530B 28812 bytes
SHA-256: 23d002e43d16ac362d78164226c1e1a44d45b1cbf2b6d58ca94ea83a79479966
font_01_sfnt_off000093ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93ED 18860 bytes
SHA-256: 8c4095287f825dd0a3be03c022828491f9f23e017ff17e65771a7fd196509226

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