Malicious PDF — malware analysis report

Static analysis result for SHA-256 e740bd5135ebe6f0…

MALICIOUS

PDF

40.2 KB Created: 2021-04-30 08:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3f414fd40df1f3710058f73761f94262 SHA-1: 59426ece9a283e61bd4e5201933fa32c53a91418 SHA-256: e740bd5135ebe6f074a43019d8e0b16b4a103dda238de826df6a96e7dcfe3a1f
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/do-you-want-free-robux-get-unlimited-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/cheats-for-royale-high-school-on-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/giving-people-free-robux-livestream.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-model-purchase-request-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-accounts-with-robux-dantdm.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/bleus-free-robux.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-virus.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacks-in-jailbreak-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/terminal-railway-roblox-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/afk-hacker-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/getbucks-free-roblox.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_off00003df2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3DF2 24872 bytes
SHA-256: bc0528c91ecef87d6f70784aad003a56ef28832904051d6a1c6436e5c4d5df35
font_01_sfnt_off00007715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 19688 bytes
SHA-256: 94a8f4ed3925f84da200099a927b40d73f7f9a579af44acf37ff02787e7de7cc

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