Malicious PDF — malware analysis report

Static analysis result for SHA-256 26955df02e51aa0c…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 00:38:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d23ba07c5df926cd864c3d43aaa23e03 SHA-1: 1fad957d05e7175e00ea2dfc520b77e6839bdeb3 SHA-256: 26955df02e51aa0cfacb0d9c0132b3a888874e3ec62d041865614c681dfedfc6
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/431946152/robux-rewards-game-hack PDF link annotation
    • http://mohacad.com/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-help-free-robux_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_off000043c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43C9 26860 bytes
SHA-256: 4c1b2de2c05c6b848f5c2d0be5ae730f5e62b2a5e59e8110a250fe139cc2b023
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 18416 bytes
SHA-256: baa52bc2b9097a09398c96fb3294e1a8f27ad59dda05ce480693cb4701b7841d

Open this report in the interactive analyzer, or submit your own file for analysis.