Malicious PDF — malware analysis report

Static analysis result for SHA-256 c633dff0c645fcc1…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 19:42:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6cccd4a323cc9601d7d8e75f77f49191 SHA-1: b8cc3ee630e6db1ec35d60a93edf634e2a693dcb SHA-256: c633dff0c645fcc1991fdd7dd4e0e1f83016bd53695c22d7269e0bac65691f73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free robux' to lure users. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick the user into downloading a potentially malicious payload. No scripts were extracted, but the presence of malicious links and the lure content are sufficient indicators.

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-hack-on-any-game-on-roblox-game-hack In PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-on-gametest-roblox-com_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/descargar-hack-para-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/hack-r-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-roblox-help_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/robux-get-com_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-hack-script-ihyper_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-2021-no-waiting_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-how-to-make-an-anti-cheat_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-csgo-cases-fre_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/cheat-for-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-accounts-discord-bot_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_off00002f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F80 21960 bytes
SHA-256: e28e8faaccb3936b4fc8e8e4136f32624f5b9cc687723aa369bceafc8a87289f
font_01_sfnt_off0000603b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 19260 bytes
SHA-256: 9d421174aab17e7956d520e5221ce5a4007d52746328aab2872023f4e5aad6dd

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