Malicious PDF — malware analysis report

Static analysis result for SHA-256 6250cb0c53b48b48…

MALICIOUS

PDF

33.4 KB Created: 2021-07-20 10:50:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e8235bd88faef1c3a4f60b3a610687f9 SHA-1: 7a643d1012c146d8763df9120286fdbfb0199614 SHA-256: 6250cb0c53b48b48e34bebbe3c6aab16a46bbcb6c9609b08550f228d3f4fb57f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to hacking game accounts and obtaining free in-game currency, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the link. No scripts were extracted, but the document's content and embedded URL suggest a phishing attempt to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.tw/app/431946152/how-to-hack-a-roblox-account-easy-game-hack PDF link annotation
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.letapbiosolutions.com/uploaded_files/userfiles/files/get-free-followers-on-tiktok_GM835599320.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_off00002d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D75 22120 bytes
SHA-256: b19b7fd7739f5fc18badd9122c121acf443a90140ba9f582d4ac72e53a67136a
font_01_sfnt_off00005e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 18956 bytes
SHA-256: 6b48a3217c7bcc7f5da290e5b055d91e1ce12a3bd260c7f67175daec744aae47

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