Malicious PDF — malware analysis report

Static analysis result for SHA-256 627b8e911a3488ff…

MALICIOUS

PDF

48.1 KB Created: 2021-06-08 21:48:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9b02e152edf9c7006b5ff12c81343bd3 SHA-1: 097d28744477f3e58f6ebaf78ae236d4c0841252 SHA-256: 627b8e911a3488ffd66d2a7ce6c4d8070a89e8bd81cd4fec8581722fe638599f
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as offers for free game currency or hacks. The primary lure is a link to 'free Robux', which directs to a URL associated with malicious infrastructure. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/do-you-want-free-robux-get-unlimited-robux-game-hack In PDF document text
    • http://suaedy-library.net/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/hack-para-volar-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fa3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA3 24552 bytes
SHA-256: 42d29a9f7479c3d85921dabb7dd2e9a0dd19bdfad80863a5d6aca425738d1623
font_01_sfnt_off000087d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D3 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off000094f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F9 19688 bytes
SHA-256: 94a8f4ed3925f84da200099a927b40d73f7f9a579af44acf37ff02787e7de7cc