Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ecb5457eed0209…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 14:54:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2f477b621af75ca660cc3e4c6dbd878a SHA-1: f8366408d598f1078897b21782b303bbb8941c3b SHA-256: 93ecb5457eed0209a6c017172c8b8b562fbae042515931d22e44589b49c3499f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is associated with a game hack redirector. No scripts were extracted, but the document's structure and embedded links indicate a phishing or scam attempt.

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.co/app/431946152/robuxian-robux-hack-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/wurst-mc_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/hacks-for-jailbrak-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/freerobuxklub_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_off00002ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE9 22116 bytes
SHA-256: dc65b4f1da0e65d180318529beb231b709a66efcb14a6d0a5563f112dbebad40
font_01_sfnt_off00006032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6032 18840 bytes
SHA-256: a1c3271ac57c7eab08abf3d90a1ab9329f60e7ffc5786c21bce9c2a6c6c554b7