Malicious PDF — malware analysis report

Static analysis result for SHA-256 6205e38efc358e06…

MALICIOUS

PDF

52.6 KB Created: 2021-06-07 07:53:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f25238607f8af76b72d24ce72aa9321d SHA-1: b99f2a17265725b554b9b532aae5687c4c16970f SHA-256: 6205e38efc358e068c76745e9838dbe2637360f29ad54325fcaa7433d6233d20
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9614

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/how-to-hack-roblox-2021-game-hack PDF link annotation
    • http://cmme.it/images/roblox-verification_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cmme.it/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://cmme.it/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cmme.it/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://cmme.it/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://cmme.it/images/robux-boost_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://cmme.it/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://cmme.it/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cmme.it/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://cmme.it/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://cmme.it/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://cmme.it/images/free-robux-no-human-verification_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_off00004f6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6C 35444 bytes
SHA-256: 53d5975f264fb7d25c1d710557a929c1f1a70aa05e6ace1ce5db9f5df6043570
font_01_sfnt_off00009ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED5 3084 bytes
SHA-256: 4889dc98a6bfd3c9244583f92387be58625a91e7a969778ad35ada89b27ed636
font_02_sfnt_off0000a97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA97B 18748 bytes
SHA-256: 82830e686af2a9787477f8716b243dfdc4e826425849e85a18f820c98dc205f5

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