Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e81f7eea3c601f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-02 03:21:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 77f8ffecffd058c4c407d78bb07f34d1 SHA-1: c2a2c258d9c2e840a4c9fdc3d9224bd98bae15c8 SHA-256: e2e81f7eea3c601fba4720e7289633a744b482e4d7dae205487e50762044cf5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'free Robux' or game hacks, which is a common lure for malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the embedded URLs and the nature of the lure suggest an attempt to trick the user into downloading a second-stage payload.

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/green-complex-give-free-robux-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/rex-points-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-ro-ghoul-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/best-free-troll-avatars-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-tool_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/comment-avoir-des-robux-gratuit-freerobux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-ipad-only_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/tiktok-free-8-ball-pool_GM835599320.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spin-app-2021_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_off00002ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC3 22108 bytes
SHA-256: 0e9c47818bd826cc8cc0e13b7056f586f2b837786590ab6e24072fc5bbbf895c
font_01_sfnt_off00005fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 19460 bytes
SHA-256: 806d19ea034dbe3cc5489cad04482f900bd823242315bf96812a85eaf9f1a92b

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