Malicious PDF — malware analysis report

Static analysis result for SHA-256 75065a85927a2a01…

MALICIOUS

PDF

41.5 KB Created: 2021-05-11 15:06:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c85f1f53a3860a4b81927f37a4cf0951 SHA-1: a7a0fb36b576d6ea64104e47eeff5ea39f5943fe SHA-256: 75065a85927a2a01d481fca1ca679f2a37a47b1947abae11863fd42f21ad4bf5
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 0.9971

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.xyz/app/406889139/coin-master-email-free-spins-game-hack PDF link annotation
    • http://greasley.website/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-free-spins_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
stream_003_off000048e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E6 24272 bytes
SHA-256: 45a229cf16e5a972035b3ac79667442693ce5bc4519d5ad4174b4a33fac31e57
font_01_sfnt_off00008057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 18220 bytes
SHA-256: 6abc40c27418d042928f00883f7f6ae445038055fc973b4cc9155520e44fc93a

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