Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1444bef25ce0fe7…

MALICIOUS

PDF

36.5 KB Created: 2021-06-19 21:30:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 171c2d1d912b5b1977c89d1414ed0907 SHA-1: 569cb4d52961e03618cc13308590512ae7fad508 SHA-256: b1444bef25ce0fe76d84caa4216c0ba32c8279a4b8fee2acfccf28aa3e29981d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for a 'free generator / game hack' which redirects to a malicious URL. The ML classifier strongly indicated maliciousness, and the document body contains text and links related to obtaining free Robux and game hacks. The presence of embedded URLs suggests an attempt to download further malicious content or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://netcdn.co/app/431946152/free-robux-mod-game-hack PDF link annotation
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/rbx-free_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://pinbandulsamirwisuda.com/ckfinder/userfiles/files/free-spins-and-coins-coin-master_GM406889139.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
font_00_sfnt_off000035ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35AD 23212 bytes
SHA-256: 9616c8c0068b17333a332fe3b0c9418b63157ef61b61d284be5517e4037ed9bd
font_01_sfnt_off000069bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 19088 bytes
SHA-256: 3c56140fee9dfb5ded46378f21a8de948775312b2d7b3282d1f8cc46bd34fe6a

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