Malicious PDF — malware analysis report

Static analysis result for SHA-256 140e4a29f063dbab…

MALICIOUS

PDF

46.9 KB Created: 2021-06-11 00:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 63220c470beae2eeececfb18e4ecc4cc SHA-1: 137ed7791153ce5412283cc1c416a9449a24234e SHA-256: 140e4a29f063dbabd9669179248c94cffa44cd2f928339899927ba1e2f56ec10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary link, https://netcdn.tw/app/431946152/roblox-obby-free-robux-game-hack, is identified as a lure for free Robux. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to lead users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/roblox-obby-free-robux-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-build-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-accounts-with-robux-that-work-2021_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_off00004f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F84 30464 bytes
SHA-256: 57000c058860c215b55fde8e3bb1fde8a1b6631c1def26d8640ceecd6f06ebe6
font_01_sfnt_off00009519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9519 18268 bytes
SHA-256: 4b6c7cb60295e669dfaf962ac16bc48a391ab6b5c2899a7ddde9667193d7d418

Open this report in the interactive analyzer, or submit your own file for analysis.