Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71216d7a085b4a7…

MALICIOUS

PDF

47.0 KB Created: 2021-06-09 12:19:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fda2b478467dd2fb120953d4fc818004 SHA-1: b66d0ac35b7915e3cebf843faaa91e301c3ca06f SHA-256: c71216d7a085b4a7fe7c00fef04ec0e35974b67fec85a65f0cd15aeacd434a02
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-download-roblox-on-computer-hack-tool-game-hack PDF link annotation
    • http://perpustakaan.stikim.ac.id/slims/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-hack-the-creator-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/tiktok-for-free-online_GM835599320.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/www-roblox-com-cheat-in_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-promo-codes-2021_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
stream_004_off000055b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55B4 27460 bytes
SHA-256: 65135f530cad46e51081a80e7fcce9576608d1e24df3105a065dbe59f4d1a191
font_01_sfnt_off000091f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F0 19368 bytes
SHA-256: b0c677bdd733714be0752a09159c3143892d8bf440c891de5fea88b70cd3ba5b

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