Malicious PDF — malware analysis report

Static analysis result for SHA-256 494c90173d2a1be0…

MALICIOUS

PDF

41.9 KB Created: 2021-04-25 11:30:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8e182c879b8068b902250ddba81d00ca SHA-1: 20bdada52f02ca32d365eaf4f757baa7b0369321 SHA-256: 494c90173d2a1be0f2c7db2a7bf77efcfe6aee897253ac9825e7065c38fe9d91
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/how-to-get-free-money-roblox-vehicle-simulator-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-unlimited-robux-ad.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-become-a-roblox-hacker.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-promo-code-hacker.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-accounts-28-october-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/emojicode-roblox-2021-get-emojis-free-2021-d-.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/are-any-boys-free-in-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-inspect-element-pastebin.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/google-give-me-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-thats-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacker-roblox-avatar.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_off0000412b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x412B 27028 bytes
SHA-256: 76e68dd7bce7009dbbc15b6262a9c706f14a4f474d175d37b8857643db6a4c97
font_01_sfnt_off00007e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 19640 bytes
SHA-256: 66ba8be28e21e1f6892bf6d625a2dedbf715413b1df908ec5ab8f1ad8347ad50

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