Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cca8569b89e3953…

MALICIOUS

PDF

41.5 KB Created: 2021-04-28 23:08:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e91979a7a9172031a549b3ad5ed0cb0f SHA-1: 62d6e7fbd62d39975ee208765adb11db8ff96049 SHA-256: 9cca8569b89e3953bb2e5b5d4fb837ca9bedb6efe784986ad743fd22f01b86a6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, with a primary URL identified as a 'free generator / game hack' lure. This suggests the document is designed to trick users into visiting a potentially malicious website, likely for credential harvesting or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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/roblox-edit-money-value-cheat-2021-game-hack PDF link annotation
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-hack-no-verification-or-survey-2021.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-hack-pc-robux.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-hack-de-jailbreak-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/robux-hack-no-download-or-human-verification.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-piano-hack.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/crimson-roblox-hack.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-obby-limited-time-only-2021.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-on-ipad-pro.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/get-a-free-promo-codes-for-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-how-to-get-free-hats.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_off000041cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41CB 26012 bytes
SHA-256: 15703ff0991a0c344d4430482721b3d5b024caf83aa05003c93a6a25215de1ff
font_01_sfnt_off00007c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5E 19628 bytes
SHA-256: 00e0617c44a0b91d097cf285e93f49a4b015896b9aa71684cf68942b3ace73bc

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