Malicious PDF — malware analysis report

Static analysis result for SHA-256 e609581e11c813b8…

MALICIOUS

PDF

32.2 KB Created: 2021-07-30 02:53:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8924fd202c4ba69b3726e107d689f5f2 SHA-1: 1004db10d83d416972a8ef935fe0e4ecedc807c9 SHA-256: e609581e11c813b8a94c6004462aeadd6b12173d2809e8b0526daa0db1b28160
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to the URL http://netcdn.tw/app/835599320/freer-pro-tiktok-game-hack. This URL is likely part of a phishing or scam campaign designed to trick users into visiting potentially malicious sites. The presence of multiple PDF links on domains like kierowcyhgv.uk further suggests a coordinated effort to distribute such lures. No scripts were extracted, but the document's structure and embedded links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/835599320/freer-pro-tiktok-game-hack PDF link annotation
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-hack-2021_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_off00002a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7C 22920 bytes
SHA-256: 355d336b9a6bbd285dd93f96f2de70e2f99f97685bc588fce58cdc1e517f3d13
font_01_sfnt_off00005e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E01 17612 bytes
SHA-256: ce89ed17beb43e5874c760a665d90bca09271831bf209f2f19e5d757293baf95

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