Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3331b6fd90558e7…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 12:43:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3a9053794e96d2076934d8d84acfbfef SHA-1: 3015132c094f161c60fd37dd2b49eea74221d6f6 SHA-256: c3331b6fd90558e7acd34e36fd0b4839072262713ec17c6a50c919cb1bf1ee2f
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 0.9980

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.tw/app/406889139/www-coin-master-hack-com-game-hack PDF link annotation
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-open-cheat-engine-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-money-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-photosmasher-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/new-free-roblox-hack-rtfsplorer-level-7-explorer-op-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-para-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheap-free-easy-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-2021-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-sand-simulator-infinite-backpack-code-hack-android-noscript_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.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_off00002e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E64 22880 bytes
SHA-256: 41c024be1a5a75d4e67e5559161e285c5ff839fddce0662fb8300341bafcc6c1
font_01_sfnt_off000061e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 18628 bytes
SHA-256: 60fc02595c4fd4bdb4ac2d5fd29e74a312ca99cfa8da20533531767e60f20837

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