Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65525f7c4fb06ca…

MALICIOUS

PDF

32.7 KB Created: 2021-06-26 03:47:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e22c50b215d00581c5600ec112123cce SHA-1: 483545d46c3083d362f1c6a706cc96c1d1ef5048 SHA-256: c65525f7c4fb06caad131c28ffc8d0d9060b48a1331986789c3d654caba04ff2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, including a prominent one to 'netcdn.co' which is flagged as a game hack redirector. The document body and extracted URLs suggest a lure related to game cheats and virtual currency, aiming to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/codes-roblox-pants-hacker-game-hack PDF link annotation
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-oprewards-hack_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/fiddler-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/how-to-hack-roblox-2021-march_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-obc-in-roblox-within-30-mins_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/what-is-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-groups-2021_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_off00002ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC6 21712 bytes
SHA-256: 4df3ee2f12c11b107072b84f1b3549173b77dfa83c8e95f259417edf0acdea11
font_01_sfnt_off00005ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC1 19088 bytes
SHA-256: 3648eb39c6eb89de2761595fa111b9fb73f896228384c10f8a0ea09bb700a03a