Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfe0b9e88ac44b7…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 18:31:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1039ec7a401ba72bc29b14eec562fbeb SHA-1: 8ac5eae9a37dd047e028c7d634fbc1b29644c8ba SHA-256: 8bfe0b9e88ac44b7b980272d29df21c1d8d72070c89104c580a992cc49be4146
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-safe-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free in-game currency or hacks. The ML classifier also flagged this PDF as malicious with high confidence.

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-safe-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/pubg-uc-emoji_GM1330123889.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-hack-no-huan-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/pokemon-go-free-8-generation_GM1094591345.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/subscribe-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/usando-hacks-en-roblox-murder-mistery_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/games-that-give-u-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/oprewards-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hacked-shirts-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-into-a-roblox-studio-game_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-stuff-from-roblox-whith-no-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-and-spin_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_off00002cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC9 22404 bytes
SHA-256: da1b4ea5a6b682e0ea12a97e8c4228e6f1b9deac638b2be9ba66e29beb3222bd
font_01_sfnt_off00005ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 18716 bytes
SHA-256: 10dbf18a398b54dbdf12e35bff00225a1ca49c244028279e5f56b846bcc4a5be