Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a428452ac315293…

MALICIOUS

PDF

36.4 KB Created: 2021-05-10 10:30:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1403734128f77dca939432fb13940964 SHA-1: a9fb11ae4b1a38d5aac6284f6bb026fc23ff944f SHA-256: 5a428452ac3152939174e96343e9bd5015d89e690d8980d6975d07bfcea9a0f0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a prominent link disguised as a download button for a 'free Roblox generator/game hack'. This link directs the user to a malicious URL that presents a fake CAPTCHA or human verification prompt, likely to trick the user into executing further malicious actions or downloading a payload. The document's content and heuristics strongly indicate a social engineering lure to compromise the user.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-roblox-website-game-hack PDF link annotation
    • 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_off000032d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D1 25148 bytes
SHA-256: f5e01fe24518a5bdf963a96e8352c8417f7158238e1f1febf39cc16b98e742dd
font_01_sfnt_off00006c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C95 18372 bytes
SHA-256: 4f49704c3d2016fd3d486e698c5af7a9a5561cf776b84bb9dfcb3ffa887994c7

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