Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b34050c8176b71e…

MALICIOUS

PDF

46.3 KB Created: 2021-06-10 17:44:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d215129a3be4c2efa063ac23b4e6ff5a SHA-1: 30b40359dbfd4e66311395955743f107142b5160 SHA-256: 0b34050c8176b71ebb8b74d1559480db4b36acfd8f9b606cccac8a5d9afd7d28
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and generators to entice users to click on embedded links. The primary link, 'https://netcdn.tw/app/431946152/free-face-maker-for-roblox-game-hack', is identified as a redirector to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to exploit user interest in free game items, leading them to a site that likely hosts further malicious content or exploits.

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/free-face-maker-for-roblox-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-iosgods_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-free-minecraft-server-hosting_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
stream_004_off000051eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EB 28376 bytes
SHA-256: df3e374244b08fb5b6aa776c80c24b34026e50ccef4fdf2c2bc161f6d3aa2755
font_01_sfnt_off000091ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91CE 18544 bytes
SHA-256: 0bfa2ef33269fdb9800d1322026a584358cdee3249deed42c7385ee58d19578c

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