Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f220c9d78edd6a…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 13:57:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 71cb14b42e8c620f0240463b688cf7a8 SHA-1: 4ad95a70e682fc632a42ad02cc1b9a875dc4c117 SHA-256: 22f220c9d78edd6af3f9949ea13a4f41a84d2f2b0c8d565bd8bcc79f54226506
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free Robux, directing users to a malicious URL. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL strongly indicate a social engineering tactic to trick users into visiting a potentially harmful site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-get-free-robux-the-real-way-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-online-roblox-play_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/command-bar-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-websites_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-on-alcatel-a5_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-robux-sites-that-have-no-human-verifacations_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-para-roblox-facil-youtube_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-voucher-codes_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-human-verification-robux-sim_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-para-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/simple-game-hack-com-roblox_GM431946152.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_off0000310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310C 22620 bytes
SHA-256: e893fac827d84197fd0826694b222030c69f9e6e8be56dc0e7fa62aca8fd68ef
font_01_sfnt_off0000634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 19604 bytes
SHA-256: 04ebc396ab7af349f3b31a1a3ecf24e6bb79273409d5c5e668339bd891b40088

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