Malicious PDF — malware analysis report

Static analysis result for SHA-256 0470b72ddf2298af…

MALICIOUS

PDF

37.5 KB Created: 2021-05-20 12:44:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3c9954fc5633903fb60758d34fc4c6ae SHA-1: d925c31c4f7fc7c59e445a6144260eaf535b3207 SHA-256: 0470b72ddf2298af90539448ab5bca556bdffdbb70b666f7365d64ff88548d94
92 Risk Score

Malware Insights

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

The PDF file contains a high-confidence heuristic indicating a lure for a 'free generator / game hack' which redirects to a suspicious URL. It also presents a fake CAPTCHA or human verification prompt to trick the user. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or scam page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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-followers-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002cb6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CB6 25644 bytes
SHA-256: 59fb5ec88ca6186fafd67368d348d870454575647bb88b3dd9b98d56736bf8b8
font_01_sfnt_off000067b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B0 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000719b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719B 18112 bytes
SHA-256: ccd38d5c4d6902a87b59ff7236a25d6da26946ef77410ea8fc3c9751fa4e7a37

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