Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b041366caa1052…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 14:51:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c46037e68478689e58acc90fd0eed979 SHA-1: 91db5826a0d5aa72f18764a20984179909eef0aa SHA-256: 28b041366caa105247d657164c54df138707cc8c2fb873e6c31bce252f4e790a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure. The document body and heuristics indicate a lure for game hacks and generators, specifically mentioning 'free bane mask on Roblox'. The primary malicious URL identified is http://netcdn.co/app/431946152/free-bane-mask-on-roblox-game-hack, which is likely used to deliver a second-stage payload or lead the user to a phishing site.

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/free-bane-mask-on-roblox-game-hack In PDF document text
    • http://library.stembi.ac.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-robux-but-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-cbro-hack-the-golden-box_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-noclip-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/hach-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-withdraw_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-robux-on-a-samsung-tablet_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-hack-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-hacks-kostenlos_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-hack-into-peoples-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/android-cheating-tools-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-tower-of-hell-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/youtube-hacking-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-pastebin-no-wait_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-roblux-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-free-rap-roblox_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_off000030e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E9 21716 bytes
SHA-256: b5da6083d65e53db9c4e39560a2157658ee1d8d6e68e873ce6c3a0ad5693f5d5
font_01_sfnt_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 19016 bytes
SHA-256: 979e74e1d5c5c4c2bfafd59874fa99773ccea152add4cb9ca10787ff11d4f324