Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37487a381f0f8bf…

MALICIOUS

PDF

46.6 KB Created: 2021-06-10 14:22:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a6e535662895dcdd9c098a26c0d7d17a SHA-1: 1364cf21926f9d7fc575ef7f61466173ec11ed64 SHA-256: f37487a381f0f8bf4a3d3567bb41de6014007b7ae15b6e10ae954193ffe77f83
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains a lure for game-related cheats and private key recovery, directing users to download a file from a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple embedded URLs further supports a malicious intent to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/hack-de-robux-rapido-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pubg-uc-567_GM1330123889.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-hack-unlimited-robux_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_off0000509f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509F 28268 bytes
SHA-256: 009793b4b0ad81760600dbfe0df56de5184b5b91aa1d18f5ebfef8e76dd8b1dd
font_01_sfnt_off000091c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C5 18888 bytes
SHA-256: fb3661b51d992cb0347941ea9b4942735d199f1b8971109209f870e9e7f9f5b1

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