Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47dc5fdb1d356e8…

MALICIOUS

PDF

42.0 KB Created: 2021-04-28 15:39:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f2daf4bb78189f1e666bcfd77e15fb70 SHA-1: 51aae019e8c3a595392ff3d3803d12b356322452 SHA-256: b47dc5fdb1d356e80ac5659c75cbb5a28aba0a0e78788bdc8db058ca6ac7618c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple links to websites that claim to offer game hacks for Roblox. The primary lure, 'how-to-hack-roblox-apocalypse-rising-2021-game-hack', strongly suggests a social engineering tactic to trick users into visiting a potentially malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/431946152/how-to-hack-roblox-apocalypse-rising-2021-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-in-every-game-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-yo-hac-roblox-and-get-a-key-card-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-a-free-knife-in-roblox-assassin.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-emergency-response-liberty-county-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/best-roblox-robux-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-promo-codes-2021-not-expired.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-codes-for-robloxcomtoys.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/ipad-roblox-cheats.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-kicked-by-server-cheat-engine.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-do-you-get-a-free-robux.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_off00004209.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4209 26696 bytes
SHA-256: 9a53c28cd25b68183b1a1d25b9382c8223c20d1fbf7610ce438ffa358d55cee8
font_01_sfnt_off00007eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB8 19512 bytes
SHA-256: a0e25de6c93aa99225d500410a963a47559954a81aad14611d01197f0fc17039

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