Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcf28d97e9e2176…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 06:08:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 94305b78a79d71db49e70956659c7e25 SHA-1: 0edbf0b87736b155455d24ee7a4cd481bc20ed38 SHA-256: ebcf28d97e9e217655b169a220a245666d2912567e39c26cf1a32a8030848757
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and references to 'free Robux' and game hacks, indicating a social engineering lure. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-robux-sign-up-game-hack, is likely a redirector to a malicious site or a scam page. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting potentially harmful external resources.

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.co/app/431946152/how-to-get-free-robux-sign-up-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/free-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/microsoft-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-generator-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/nike-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-not-to-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-noscope-sniping-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/red-boy-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-robux-hack-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-adder-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1A 22832 bytes
SHA-256: dedf3c4d5f46e6bf0a36475584a5bf3c9769469fdd5f8a3e392f1a5ce70c3e18
font_01_sfnt_off0000624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 19280 bytes
SHA-256: bb59c0397b15216c795f7288f579ae911ebca62f9f6cdf1405671c94d9fb3d56

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