Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9dbfbe23c863b8…

MALICIOUS

PDF

37.8 KB Created: 2021-07-04 13:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 43195a77b4f5a06a89f295193f8c6ef8 SHA-1: 844115ca45c88917e9c826d91779e1e94f8558f9 SHA-256: ba9dbfbe23c863b8ecb892a2b29d1f6980cf5e33c8894b02c46a383b1a727547
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 0.9981

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/how-do-we-get-free-robux-game-hack PDF link annotation
    • https://sponajaib.com/ckfinder/userfiles/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/robux-hack-downlaod_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/tiktok-free-app-download_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-codes-for-the-floor-is-lava-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-games-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-no-survey-roblox-rubox-generator_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-high-school-2-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-robux-for-free-on-bowser-instantly_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
stream_002_off00003bea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BEA 22428 bytes
SHA-256: 1fe7c542e9b115f2407e99fbbc7b5a2f5285f6ecc7d8d332d0c64dae1c3c3fcc
font_01_sfnt_off00006dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 19352 bytes
SHA-256: 77d4dc97c307d7c63aabcd07bfab883361bf99189f8f493507813bf950ab756f

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