Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7eb7e5ef1fd1077…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 13:16:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c590229312c298d4bdfe94ae8ff99ff7 SHA-1: 1b91f16bdf34230eea8d659d64e33253e79c6356 SHA-256: c7eb7e5ef1fd10777234a7de8cd402c51acb36ad7d956c95762fdcadda200e71
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 0.9980

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/406889139/free-coins-and-free-spins-coin-master-2021-game-hack PDF link annotation
    • https://www.astrospace.com.tw/upload/files/roblox-determined-7-hack_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-shaggy-old-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-little-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/getrobux-info_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-free-aimbot_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/murder-mystery-2-roblox-hack-money_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/minecraft-hacked-client-112-2_GM479516143.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_off000032b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B6 23144 bytes
SHA-256: a4107760d60c73a977b020e8fe5d8dd683f3ff3772a79ab05c73737756feba19
font_01_sfnt_off000066f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F7 18752 bytes
SHA-256: 2808497b37fc1d4f34a1fffc3dd5e81983cd3403e98677a9ba5497e95ebc42c8