Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe44f88467c15d74…

MALICIOUS

PDF

41.9 KB Created: 2021-04-27 15:20:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 334a0eb9c523e6ae1447c08418af351c SHA-1: 2bd6b04d583b499004ffcb754c69803b477a53c3 SHA-256: fe44f88467c15d742efdf3f6ecee17510e6453628026f94a23c20973e8e27559
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a Roblox game hack, impersonating Microsoft to encourage clicks on malicious links. The embedded link directs to a URL known for hosting potentially malicious content. The document also contains instructions to disable security software, indicating a malicious intent to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/goblin-v1-hack-roblox-game-hack.
  • 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/goblin-v1-hack-roblox-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/roblox-those-who-remain-hack-script.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-stuff-on-roblox-catalog.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hacking-system-for-clothes-on-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-promo-cides.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/infinite-money-hack-roblox-jailbreak.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hats-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-free-obc-generator.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-toy-codes-december-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-2021-september.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/babe-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_off0000433e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x433E 26936 bytes
SHA-256: 0c02ad7411cc8e4e431e8534ddd0842971a35371580ad98d1dec331b81c8260a
font_01_sfnt_off00008170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8170 18540 bytes
SHA-256: 4e2e76278bc6486f0289894a6ad9f570da314d57fde06630230a907fc655322f

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