Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea21a47929187a96…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 03:58:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8cd780100f98f2fee781a1becf4e2405 SHA-1: ed54d2dfb749119557276bb263040ee41f77b1b7 SHA-256: ea21a47929187a9666d480f15809e906590d69607d1f69e92434181d7ce66aa8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'hacks' for popular games. The primary malicious URL identified is http://netcdn.tw/app/406889139/static-moonactive-net-rewards-game-hack. The document's content and embedded links strongly suggest a social engineering lure to drive traffic to potentially harmful websites, likely for credential harvesting or malware distribution.

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.tw/app/406889139/static-moonactive-net-rewards-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/which-pubg-uc-is-best_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/walk-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/infinite-moneyz-roblox-injector-hack-pizza-place_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-always-jump-hack_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
stream_002_off000031a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A0 23320 bytes
SHA-256: 211192caff4c3f6cdf4a61f278f8173b8f95614bda966978c6acc69b30320abe
font_01_sfnt_off00006661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6661 18284 bytes
SHA-256: b288d9ef267feb3cee4f7351aa4425256813d44ff173698cd9488028fdb93443

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