Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2185752b175b0c8…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 08:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e8a4719af6c19dda15aa6132aa80628d SHA-1: 220bb96d12de4f9938ad734c417df7c07d32ef8f SHA-256: f2185752b175b0c8b508b603d32a12b14adc1c4acfcd3c9c5b9e3b380d349b6d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free 100 Robux' and links to a URL that appears to be a generator or hack. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or scam attempt, likely leading to a malicious download or redirect. The primary IOC is the external URI pointing to a potential scam site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-100-robux-game-hack PDF link annotation
    • http://www.arichuna.com/images/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-hacks-xyz_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
stream_003_off000048e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E8 26088 bytes
SHA-256: d4a275b4397d5b6c07cdda705bf7d7b2158cd64afe7658633b6384148463911b
font_01_sfnt_off000083ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BA 18292 bytes
SHA-256: ade71c57547996cc2793a44f7be3e933a3a5664d4c8f362da863e6c031d51f12

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