Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a30e80ed0e3483…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 00:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 955b1ba8ba955dac428e58f6e9405622 SHA-1: 7b3bac858787f3d81e1ba4ecf0e11f90cdebdd1f SHA-256: b9a30e80ed0e348368961b0f4012e2f99ecebb72cd27a0c8089322fa85eb8ec7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs and references to free Robux and game hacks, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the overall theme indicate an attempt to trick the user into downloading a second-stage payload, likely related to cheating or exploiting games.

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/ww-free-robux-codes-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/pokemon-go-free-high-level-account-hack_GM1094591345.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-hacks-dll-downloads_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/tampermonkey-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-roblox-catalog-heaven-games_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/change-your-name-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-gg-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-kak-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_off00002f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F60 22332 bytes
SHA-256: cf020d0306b53a068ddfbb38d3c5b9968a7d6ce73b42ff93a39079d1d227a429
font_01_sfnt_off00006109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 19252 bytes
SHA-256: 6a7fefc2281145ccb2a526fb97541a5a2328a32dd009e78fb50a95cbe4ac4c47

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