Malicious PDF — malware analysis report

Static analysis result for SHA-256 577a98a7747021ad…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 20:39:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 722e6b9092d5f4c0e751649913b2e037 SHA-1: 78f869ac6b23d570c54bb441ec9e7ddb50bcf221 SHA-256: 577a98a7747021ada83aa4c15bf595dcdf536f4561eb5041be8dec3f10c55528
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a heuristic firing indicating it links to a 'free generator / game hack' lure, aiming to trick users into clicking. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, likely for further payload delivery or phishing. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/free-minecraft-coloring-pages-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://reggieslockandkey.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/is-there-any-way-to-get-free-robux_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
stream_002_off0000346e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346E 25136 bytes
SHA-256: 5aa93371dc61b32740c4b74b766c4c977360bb509a8cc8fc5d044c766c7145ec
font_01_sfnt_off00006db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB4 18224 bytes
SHA-256: 6e343a052bd34aead68fa90857bbbafbb2ebf9a3dc2705f241561e157218897d

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