Malicious PDF — malware analysis report

Static analysis result for SHA-256 b822285fa2a4327f…

MALICIOUS

PDF

41.1 KB Created: 2021-04-23 13:31:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5cbbb9b9560ca060cd3f71e583ef01e4 SHA-1: 57b17ad5534bf6867b4a9823934023f343e7599a SHA-256: b822285fa2a4327f1c55d98e6b1145a6a6030bd07c9c202f3c46a2699d679efe
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to "free clothes" and "game hacks" for Roblox, directing users to a suspicious URL. The heuristic firings indicate this is a malicious PDF linking to a game hack redirector. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lead the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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://netsecure.top/app/431946152/how-to-get-free-clothes-on-roblox-without-robux-game-hack PDF link annotation
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-dragon-ball-online-fighting-cheat-engine.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/generator-free-account-old-roblox.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-stuff-roblox-2021.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-give-away-codes-robux.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-codes-site.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-free-play-download.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-apps-info-roblox-robux-hack-generator.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hacked-shirts-roblox.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-october.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/camecards-for-roblox-free-sent-to-email-no-surveys.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_003_off000042d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42D3 26000 bytes
SHA-256: 62a2cc7dc203dcc66a3ba93194917ae1e6f5307b20336c9f3babba8794970bf9
font_01_sfnt_off00007d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D64 18840 bytes
SHA-256: 413ea4d1df4c2e31279337bd5805568056a5a6425cfebf229af21785d04fe044

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