Malicious PDF — malware analysis report

Static analysis result for SHA-256 c833e721640a5c39…

MALICIOUS

PDF

43.6 KB Created: 2021-05-13 00:01:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 95ba832941daac621459505ca2fb3ae3 SHA-1: 9c9618c31a3cb965a3e3b7a7d4676f1f74471a71 SHA-256: c833e721640a5c392f49eff1e2bdc60de2fb11e7a0a2c7439662e4b91e886d06
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure for 'free Robux codes' and game hacks, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-codes-2021-game-hack, which likely serves as a landing page for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-robux-codes-2021-game-hack PDF link annotation
    • http://dygmotors.com.py/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-download_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/i-want-robux_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-hackcom-xyz_GM406889139.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_003_off000049a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A1 26460 bytes
SHA-256: b141d6b1f7be7d32c4f3e59430c1cc1e69bbac90a717862b877c1752646e9709
font_01_sfnt_off0000873c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873C 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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