Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eedb4a0ca478ffd…

MALICIOUS

PDF

37.0 KB Created: 2021-05-17 23:00:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d8419910d195242e2acd3f26fe2c4db5 SHA-1: 5635f27f683c9e852f5b10b4a92e883e1411f570 SHA-256: 9eedb4a0ca478ffd51fa06072fafa2f5e983dac9890d99a94036aab70fc4428f
132 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free Robux generator' and a fake CAPTCHA, aiming to trick the user into clicking a malicious link. The embedded URL points to a suspicious domain associated with game hacks and generators. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-do-i-get-free-robux-on-roblox-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000343a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x343A 25156 bytes
SHA-256: 61885c757832734118f49098b35afdda4d5a103e10ed167d5a19cfa6e67cf249
font_01_sfnt_off00006ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA0 18524 bytes
SHA-256: 4ccd670e6a0bad46446eeab730d71d218c542e1f5d690955267ad9a8693a3722

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