Malicious PDF — malware analysis report

Static analysis result for SHA-256 c928f0dcde2b5f35…

MALICIOUS

PDF

32.4 KB Created: 2021-06-20 04:06:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b0e0a8279dc10d84a529c03b03c79503 SHA-1: 106c07b64b0a1be5b1fc9d51333190c0e07d942f SHA-256: c928f0dcde2b5f3586edbce7fe2909c0cd8bbe260163c58aa7dcd0cbc4b41b43
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 0.9824

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/black-hair-on-roblox-free-game-hack PDF link annotation
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/infinite-health-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/escape-school-obby-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/instalar-hack-btools-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-holy-sword-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-code-roblox-item_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/e-free-roblox_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_off00002a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4A 21816 bytes
SHA-256: ee9ab33c0247b3aee8015fc36b5a4642bbd671a1e4b752b5f5a87c6e8a376998
font_01_sfnt_off00005a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7B 18940 bytes
SHA-256: bd5e8dd2f52d694d9143c93f24c395c74053d3936ad1ad0a69c69767320c81b1

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