Malicious PDF — malware analysis report

Static analysis result for SHA-256 4237d8e5ceaff9a8…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 15:08:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f87e4a6880065244826f6b417776669f SHA-1: 148afef3563cc6a1f4c95509c16a08e5bb3f9a71 SHA-256: 4237d8e5ceaff9a83772b82a97bc299da8fcef138ca20ffbc63b490d2d99f71a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, with a critical heuristic identifying one as a malicious redirector. The document body and heuristics suggest a lure related to game hacks and free currency, specifically for Roblox. The primary malicious URL identified is http://netcdn.co/app/431946152/how-to-find-out-who-hacked-your-account-on-roblox-game-hack, which is likely used to redirect users to a further malicious destination.

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/how-to-find-out-who-hacked-your-account-on-roblox-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/watch-ads-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-stuff-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hack-para-boxing-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-eady_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-report-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-redeem-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/khaos-free-robuxcom_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-shower-simulator-cheats-for-time_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/natural-disasters-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robuxs-pate_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/vpn-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-robux-game-you-achley-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-com_GM431946152.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_off00003021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3021 22256 bytes
SHA-256: ee8654539353848f0493080f03d4fe703c5a7e3e0d1deb275f40107d21315614
font_01_sfnt_off0000610f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 20048 bytes
SHA-256: 480af393db43e4005ad4218da234557b95616bd07bf6340f5c0b0434931a1198