Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d7fb1f4dc7c920…

MALICIOUS

PDF

43.6 KB Created: 2021-05-14 20:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 308c75674931aff98fc50001ffe0c206 SHA-1: c1cbc194cd76495b282cbb8d1faed375d634ef0f SHA-256: 07d7fb1f4dc7c920723046513d96c373a308c17616681a9704d8b7becf2e61ed
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 0.9969

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/431946152/jailbreak-roblox-hack-game-hack PDF link annotation
    • http://mohacad.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/robux-survey_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/robux-rewards_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-just-click_GM431946152.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_off00004a22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A22 26944 bytes
SHA-256: 4eae90a0eb9cb4516ce1371754e8bd95a654c72d0e641d18fa6597c32d751024
font_01_sfnt_off000087b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B8 18468 bytes
SHA-256: 47180ef6fd58f08eabdcf8de8850cf434555edaa977bcc29afa6d0c928aef64e

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