Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ca229d397779ed…

MALICIOUS

PDF

34.5 KB Created: 2021-06-30 13:05:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 07d685e4feb93ae9a7b6cca35f0b2f53 SHA-1: fe483370977daf5f48a17aa0b7b3d9c47c930928 SHA-256: 78ca229d397779edd63d1ac636c97a2ab5d046a1c9fd3a84af291b8f0e2e72d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to a known malicious redirector, ultimately directing users to sites promising game hacks and free currency. The heuristic firings indicate the PDF is designed as a lure to redirect users to potentially harmful content. No scripts were extracted, but the primary attack vector is the malicious redirection via embedded URLs.

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/script-hack-roblox-no-name-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-park-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-peoples-passwords-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-discord-ggroups_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/green-ball-complex-free-robux_GM431946152.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/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/earn-free-robux-9nline_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-use-free-models-in-roblox_GM431946152.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://pustaka.pn-calang.go.id/repository/free-unlimited-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-hack-2021-july_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-without-offers_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_off00002f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F91 22232 bytes
SHA-256: 9ff7300964bf56552f601b52832ef5560888cff99d7eb2f5de1d1eeca03b156c
font_01_sfnt_off00006101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6101 19316 bytes
SHA-256: 13d0d6a64eae8421b65642c2365790e28017fb7804809470e4189b889923633d

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