Malicious PDF — malware analysis report

Static analysis result for SHA-256 becb50725c73a943…

MALICIOUS

PDF

35.9 KB Created: 2021-06-22 17:35:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9565f840ca411628bb374e884181ff30 SHA-1: bf6bb32bc2256ee9166f57aad1d6885b20e7d298 SHA-256: becb50725c73a943c4d7e7ffce1bfca9d15c048b5e4470d4b90050240400415d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free game hacks' and directs users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent. The document's content and heuristics indicate it is designed to trick users into visiting a site that likely hosts malware or facilitates further compromise.

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.co/app/431946152/thomas-and-friends-roblox-free-games-game-hack PDF link annotation
    • https://irecruitersafrica.com/ckfinder/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/roblox-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/how-to-hack-on-roblox-no-usb-no-download_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/roblox-analytics-hack_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/get-easy-free-robux_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://irecruitersafrica.com/ckfinder/userfiles/files/coin-master-free-cards-link-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_off000033b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B0 22888 bytes
SHA-256: fc20a59b738a438b385ece8551c870be537db38aa7ca7ce0a9ea44d5f65f0b7e
font_01_sfnt_off000066aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AA 19372 bytes
SHA-256: 407cd7f1bfe689ccfc2a7158b87b1d69cf9d3900c23e7afcc267bf1dbe4fd06c

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