Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fe0cc6fb2f3b50…

MALICIOUS

PDF

41.4 KB Created: 2021-04-22 16:21:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8686c4fc54ed3a3a7acdb964e2ca28a2 SHA-1: 257622cba7cd3dd6b3d32a79c1aac8ef1cea9cc4 SHA-256: f4fe0cc6fb2f3b507c6ea48d2c313b06606cc08952dce86a25fc668b58b2c102
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 0.9926

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://netsecure.pro/app/431946152/roblox-bloxburg-free-money-glitch-game-hack PDF link annotation
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-hats-on-roblox.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-hackr-hack.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-how-to-hack-gears-online-rpg-using-cheats-engine.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-hack-2021-no-survey.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-restaurant-tycon-cheat.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-do-you-really-get-free-robux.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/power-simulator-cheat-engine-roblox.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/new-roblox-hack-exploit-for-murder-mystery-2.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_off000041ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41CE 26480 bytes
SHA-256: bd935fc3b2f57b838316fdbef558d991af799dab2a39b0642f38b378f902131f
font_01_sfnt_off00007daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAA 19144 bytes
SHA-256: cf86ecf257e87663b8545790575bf66d1c543570f96bec984533a27bd1797ac0

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