Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b47026fd2945847…

MALICIOUS

PDF

47.2 KB Created: 2021-06-10 21:24:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 97eb5ea7a4be3b380d553ef7bf7aa287 SHA-1: 3c5e5a582c3c90507f5b8576e58af041207e1623 SHA-256: 9b47026fd29458479fb339e996698816e85429b9ece8b046fc670b225e508d7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks and redirects to a known malicious URL. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded link and the nature of the lure suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

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/how-to-hack-an-abandoned-roblox-account-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-speed-hack-with-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/console-hack-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/instant-hack-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacks-safe_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-into-peoples-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-robux-android-1_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-robux-for-free_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_off00005382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5382 29968 bytes
SHA-256: c6f4b91d2de225ba3b67ea074a61c56f905f28416c5087f52b1fb4e2362df022
font_01_sfnt_off0000944f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944F 18764 bytes
SHA-256: 3a4e7a0eed3e5746f18e63bf61ff6362ce0552f35d63a58b8b7d89cdf29c04e2

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