Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2018386f679d5d…

MALICIOUS

PDF

40.9 KB Created: 2021-04-28 19:16:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0c70dad02a5666b8f7e43fa065734fd8 SHA-1: a1fd9c8f757d62fb2b0ed697efb788e722211f42 SHA-256: 3d2018386f679d5d776b1110edc39f49d46752d7bcd6e9e243715ef613805c6f
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link disguised as a "free generator / game hack" which redirects to a malicious URL. This lure is designed to trick users into clicking the link, likely leading them to a site that hosts further malware or phishing content. The presence of multiple related PDF links suggests a campaign distributing these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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/crimson-roblox-hack-game-hack PDF link annotation
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-xbox-one-2021.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/how-to-get-free-robux-without-a-human-verification.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/free-robux-on-ipad-pro.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/no-virus-hack-roblox.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/free-roblox-accounts-with-robux-list.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-hack-for-android-apk.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_off00003ff4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FF4 27056 bytes
SHA-256: b5bc79d5bab16aecd3fd0f46e29758c5f4c3a5a5593b0dbf56354fbfde4186f9
font_01_sfnt_off00007d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D64 18564 bytes
SHA-256: 838e6f3d544d1ab74415d82343f649af5f2cb721ec107966d54ee9bdbd7df064

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