Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82e8fa125b36604…

MALICIOUS

PDF

33.9 KB Created: 2021-06-21 01:22:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 69185e7c30542097c29a739cd07f56be SHA-1: 7009766027f24bb600db6f916634909b2db87bcb SHA-256: a82e8fa125b36604403e278c465eb06d79671af3f598e855a45c93ea1a62fc3e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link and text related to 'free Robux' and 'game hacks', indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The primary lure directs users to a URL hosted on 'netcdn.co', likely a redirector to a malicious site.

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-that-works-game-hack PDF link annotation
    • http://www.compusiteinc.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-get-free-roblox-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-avatar-free-superhero-body_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/roblox-20-body-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/easy-robux-hack_GM431946152.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_off00002cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB8 22200 bytes
SHA-256: 5305716a86959187b17c8ccd829d46e558cf749e56fbafb0bf5957ba83825b0e
font_01_sfnt_off00005e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 19516 bytes
SHA-256: 10088590ba7ecb094e034c3a025c4d6b53939e0dca2ccb95625e4e2de9264a85

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