Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee61a547b3143c3…

MALICIOUS

PDF

32.9 KB Created: 2021-07-19 13:41:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cd60932618201436b895ea487fb83e9a SHA-1: 2919f529b06106961ca918f6480c9240eeccc974 SHA-256: 7ee61a547b3143c317199a377fc806c9f2a714c76234a6fc816710bc48f2ae54
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/431946152/free-robux-no-verification-2021-game-hack PDF link annotation
    • https://www.solucionesdigit.com/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://www.solucionesdigit.com/images/can-u-get-free-robux_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_off000029bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29BD 22348 bytes
SHA-256: 5938ee6d44bb98f5492b009eb8fe87a0f52765796bd7bea5309f393171f7b2ac
font_01_sfnt_off00005bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 19188 bytes
SHA-256: 1d678ccb09ca7ab390fe1cb16a54ee3a19d850daf1d3792b9105ae8049b7bbf5