Malicious PDF — malware analysis report

Static analysis result for SHA-256 c699841831ccf08b…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 13:34:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d894f416e20ab787629a3006a0100f1 SHA-1: 2253b27568b5ca167d3824d78ce32894c29f2830 SHA-256: c699841831ccf08b1aa4195e55a8aa47852b5c9ac14ca97c510ff692bd0b4217
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.co/app/431946152/free-roblox-gift-cards-live-game-hack PDF link annotation
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/mcpe-client_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/annoying-orange-clothes-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.astrospace.com.tw/upload/files/hacked-client-for-minecraft-bedrock_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_off00002f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F20 22396 bytes
SHA-256: e0b47aeb2ff05392d405c82e508cfe9847284bf58294814f3cc3e54f2d85bf0e
font_01_sfnt_off00006064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6064 19164 bytes
SHA-256: 9ffdef90b1313acdde84d4d2be408c3e9c9abd0ec8438318608966d35df64e25