Malicious PDF — malware analysis report

Static analysis result for SHA-256 27461a3d8ee59a3a…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 03:49:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aca9bb364ddc4aa3e5ef98aa45cae325 SHA-1: da8c62149c94937b7797dcf55e16fc1f01bbde6c SHA-256: 27461a3d8ee59a3a8344013939fc44dbb25931a979ad97339919d9b84716151c
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-hack-ios-12-game-hack PDF link annotation
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B57 25524 bytes
SHA-256: cd2987079712225f674b8f6ea00bfe4ee5b4090c896d255e31e64cf345ef9249
font_01_sfnt_off000084c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 17948 bytes
SHA-256: be98af2c8b2a8f415c1138fe429d49ae8e82ec0e8d97b7102e90f5e5fc516930

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