Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b1b0295192676f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 13:07:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e2e72a46c32c717c344d3fdbcbf0da2f SHA-1: 961d2494678b4614033db8a158a073ae5cc8a5e6 SHA-256: c9b1b0295192676fc37b9bfddf3a75d28ca1e08574b43c69f8a3e3125f8536c4
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on 'game hack' lures. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL 'http://netcdn.tw/app/479516143/how-to-hack-a-minecraft-server-game-hack' strongly suggest a social engineering tactic to redirect users to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/479516143/how-to-hack-a-minecraft-server-game-hack PDF link annotation
    • http://www.travelone.ae/userfiles/files/roblox-mega-fun-obby-cheats_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/como-hackear-un-juego-de-roblox-desde-ordenador_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/hacks-para-boku-no-roblox-remastered_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-lumber-tycoon-2-hack-xbox-one_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-any-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/robux-gratis_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-roblox-bots_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-boi_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.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_off000031fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FC 22124 bytes
SHA-256: 5bf875897d7b859aca68e9a25d42ce98041d8d02656ed0511ed620b67a11d592
font_01_sfnt_off000062d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 18448 bytes
SHA-256: f1c94bc02981aac760cf80effac2d7fab2917855e343fbf4fd70c93d36576a9e

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