Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9c44331d6a3f20…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 12:13:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bd9efe859f54b518b12ced3e21ce71ab SHA-1: 050e43c83257b29fba952ed7500867664ecce150 SHA-256: 4c9c44331d6a3f202877cc0d8fdc617da026b4d38b089ac1009795ace8936d65
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 0.9865

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.online/app/406889139/coin-master-free-spins-without-human-verification-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/pubg-uc-ycom_GM1330123889.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/real-free-robux-codes_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_off00005002.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5002 25684 bytes
SHA-256: f89236a3c6392aab08f2acfe3e5a9ce7434a485d22b7dd780df13b12d75e80c2
font_01_sfnt_off00008967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8967 18784 bytes
SHA-256: 3da53c4bcca0cb9d244bcc93ce65d6bea763e6ea7e90cffc4ca77df440db5a96

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