Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fddeef131fe91d2…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 05:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2aebf2dc65c4b4af1769078c28201343 SHA-1: 10d42151c00719fea895e2d118c8875a73a823f6 SHA-256: 9fddeef131fe91d28f73e1fd7cc5103ed58ce606037a6fbec18f65c0885ee4d1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/coin-master-daily-free-spin-and-coin-link-game-hack PDF link annotation
    • http://tasleemdubai.com/userfiles/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/www-rubux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005108.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5108 25152 bytes
SHA-256: 0a1c7f79fd45f347ae947aba4e3c84553f3aa389dbbac7aafbb9b47a0dcaf3e8
font_01_sfnt_off00008a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A77 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off000097ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FF 18652 bytes
SHA-256: 9153e8ff570dd88c4a620839e4728b6040b622f618f6f7694a5530f56d9e896e

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