Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d84d2676341f836…

MALICIOUS

PDF

40.8 KB Created: 2021-04-23 10:36:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1a79122aede94a446df720d0e11994f SHA-1: 769a4b89d78f8794722c686985c16150dc4bd076 SHA-256: 4d84d2676341f836a93b0df2378b5bdfe5412eff4a87c994ac2ea9799b3c3ac5
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/hack-r-roblox-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/uirbxclub-free-robux-hacker-p.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/best-script-for-hacking-roblox.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/app-hack-roblox-robux.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-redeem-card-codes-2021.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/the-hacked-familys-basement-roblox.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/downloaf-free-roblox-robux-codes.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-play-online-for-free-no-download.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-clothes-templates.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-de-roblox-robux-gratis-2021.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-inspect-code.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_off00004214.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4214 26432 bytes
SHA-256: 6410af6c2542c25a02c7f2846072955c1c462e24e285b8b2ad7b43ecea7c3268
font_01_sfnt_off00007de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE9 18184 bytes
SHA-256: ffc97cfb2cba08db9ee5264a88bcd0e5ed7f8bad54939ca582f535e8f5ebefce

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