Malicious PDF — malware analysis report

Static analysis result for SHA-256 40d33e1cc05b9434…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 04:50:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e9d53bd4e96a8707f79484fd91fbb19c SHA-1: 7d63427dd9a9b5db9a85fb0242a4128755573725 SHA-256: 40d33e1cc05b9434a8940e7184950c63080e03fe7208adfa810cac0f7906fde4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free items, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/roblox-card-free-fake-it-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coins-coin-master-daily_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
stream_004_off000051c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C5 25100 bytes
SHA-256: d073c76af798fab79a1048d4404ce39a3bf21124dcfd34cb9d3b588ff5500384
font_01_sfnt_off00008af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF4 18624 bytes
SHA-256: 6b416c61aa6168ad6018f772e657ad15f3c3f833d820fd1381077c034802930a

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