Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf6bba9c5221b4b…

MALICIOUS

PDF

41.0 KB Created: 2021-04-27 12:56:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 506669ceb2182e28a542bae20c93a2a5 SHA-1: 31796d435b808375a7dd23cc404a23ba7372fefd SHA-256: edf6bba9c5221b4b23bba0ec870a5326bb048021024aa224ea425f849a32eb9b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as 'free promo codes' or 'game hacks' for Roblox. These links redirect to external URLs, including one that appears to be a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous game-related lures suggests a social engineering attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to external content.

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/free-promo-codes-roblox-june-2021-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/a-code-for-free-robux-script.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-in-roblox-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-clothes-on-roblox-2021-mobile.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/funny-hack-scripts-roblox-pastebin.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-guest-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/unlimited-jump-hack-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-bloxburg-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-catalog-items-on-roblox-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-add-roblox-badge-for-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/von-roblox-facebook-hacken.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_off00003f2d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F2D 26504 bytes
SHA-256: fb7283d353d1b2374a69affdccad79fbd3c2df2dc2e3e7008d155622e2e3e887
font_01_sfnt_off00007ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA7 19244 bytes
SHA-256: 0fb9c4e32838d76da097401f2bf6d775fe99ebd77a050f95dc75561dc9bb0d4d

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