Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf364229af02d47…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 21:16:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b3822d3fa8263e40ed2813fe3d6a4e2d SHA-1: 69e47368a12739a3b730257a1b0d81ce79364ea1 SHA-256: 7bf364229af02d475f70760ad933b30ad568cb5973c071b93d56f077689e94f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as generators for game hacks and currency. The document body explicitly mentions 'Roblox Robux Hack Free No Download' and includes the malicious URL, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/roblox-robux-hack-free-no-download-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/black-t-shirt-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-gear-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/foro-hackers-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-card-numbers_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-survey-no-download-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-how-to-get-groups-for-free-and-make-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/como-generar-coin-master-free-spins_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_off00002f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2B 21960 bytes
SHA-256: 77984a60a2caef66986552a0d6b014cd58a112fdeddb454f6417f6f02f272c91
font_01_sfnt_off00005fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC7 19464 bytes
SHA-256: 42a017b1193441795529e31958f20f5354c8a4a07bae554bea2236c1204a5156