Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6fa7a08ee00db3…

MALICIOUS

PDF

41.5 KB Created: 2021-04-25 03:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c23112cf22a308c3cb5a4a60b611fa79 SHA-1: 3ed3592f56019576b4aac5773965619fc35c688c SHA-256: 5d6fa7a08ee00db347728a3b59779220c088d8e009caf4c0f8c362f4970cfcb8
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks, specifically for Roblox, directing users to a suspicious URL. This suggests a social engineering tactic to trick users into downloading or visiting a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/se-puede-hackear-roblox-con-la-nueva-actualizacion-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-jump-hack-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-hacks-gratis.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/is-roblox-free-to-play.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robux-hack-no-survey-and-no-user-id.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-robux-without-downloading-games.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/tokyo-ghoul-project-killzone-roblox-cheat.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/reversal-hack-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robux-pastebin-hack-no-waiting.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-become-hacker-in-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-1m-robux-for-free-on-roblox.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_off00004429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4429 25416 bytes
SHA-256: 2ede487480c713ac855ebac99ad0a9013d64a13816f0443689a1ba6a5b59bebe
font_01_sfnt_off00007e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0B 19068 bytes
SHA-256: f9dd1138acd90d09d19259446d317fd58d1f1614c8d8aeff3ad2d4969d7ab302

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