Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c89855dd08c740c…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 01:03:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5b8354dd2c2df75474c7c5364de09c9c SHA-1: ab11c8ad64c2d63ada7a3624961d9fe4842286c1 SHA-256: 2c89855dd08c740c83d00bd89d7142138e40452ae7de46cbf6fd494e0c62aafa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, primarily offering 'free robux' or game hacks, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a download button lure reinforces this assessment. Although no scripts were extracted, the document's structure and embedded URLs suggest it is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/code-roblox-free-robux-game-hack PDF link annotation
    • http://library.unissula.ac.id/fe/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/1m-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-speed-hack-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-free-blue-tick_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/why-does-roblox-shutdown-when-i-use-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-link-fb_GM406889139.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_off00003145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3145 22256 bytes
SHA-256: 0a1179947f15b33a6633facbb5f80dc937c301d98c75006d8c369903dc8d5a65
font_01_sfnt_off000062e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 18964 bytes
SHA-256: c75020a715d9b9e1aa56e7f63de7f28b4ad7207f32f872a12481ac374e826b67

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