Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2a93953cd8b304…

MALICIOUS

PDF

46.9 KB Created: 2021-06-09 12:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 64a3fd5e222fdd6c670b395d435e55db SHA-1: 62162dd1fe33032897a0486e93fcb2acfd29bff1 SHA-256: 5f2a93953cd8b30407daeb0f5faff315e8e5e01e011529ccba324c4a3f020019
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 0.9832

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 https://netcdn.tw/app/431946152/how-to-get-free-robux-easy-on-chromebook-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/heroes-online-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/creepy-hacker-roblox-face_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/sign-in-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-aerial-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/blogspot-coin-master-free-spins_GM406889139.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
stream_004_off00005427.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5427 27964 bytes
SHA-256: 81c2e2d969cd3a71ced531602637359730067b384891044afd1cbc247673e26d
font_01_sfnt_off00009228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9228 19288 bytes
SHA-256: 491ec6c1cef7a8c8627f54782d36034a92aa0951d23a8eadd6dd4395bfc32a43

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