Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cf548ab4862525…

MALICIOUS

PDF

41.2 KB Created: 2021-04-24 14:14:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a63b28b5c2edfcc54405ea54274709af SHA-1: 4e15f4c6a5cf2ea2a6c7f40f61aec7934bafe13c SHA-256: d8cf548ab4862525b1eb7f42f198e21ae809dc9e88ccb8a1a65011f075a7ef50
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-get-free-robux-no-human-verification-on-pc-game-hack PDF link annotation
    • http://torkelson.se/images/how-do-u-hack-accounts-roblox.pdfIn PDF document text
    • http://torkelson.se/images/roblox-free-item-source-code.pdfIn PDF document text
    • http://torkelson.se/images/roblox-is-asking-me-to-free-space-help.pdfIn PDF document text
    • http://torkelson.se/images/roblox-skywars-hack-download.pdfIn PDF document text
    • http://torkelson.se/images/steal-roblox-game-using-cheat-engine.pdfIn PDF document text
    • http://torkelson.se/images/hack-codes-for-robux.pdfIn PDF document text
    • http://torkelson.se/images/admin-commands-roblox-hack-2021.pdfIn PDF document text
    • http://torkelson.se/images/free-app-roblox-play-as-a-guest.pdfIn PDF document text
    • http://torkelson.se/images/how-to-hack-games-on-roblox-on-pc.pdfIn PDF document text
    • http://torkelson.se/images/how-to-hack-roblox-lumber-tycoon-2-money.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_off0000416d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x416D 25976 bytes
SHA-256: 6a0d929206168e1482a6423083ca5c4485226dec09a36b9202320bc423e5afbf
font_01_sfnt_off00007cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD8 19180 bytes
SHA-256: 1365c815fdb8a96b72d12ac2c2de9740c1e4251a5eeb4b3a8509e175f242b555

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