Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ed483e326a9670…

MALICIOUS

PDF

47.1 KB Created: 2021-06-01 22:55:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e110cf802522586eae422f2bfa9de301 SHA-1: 8c37b9874a8d6453d14e6315f86710634afe68f6 SHA-256: 40ed483e326a96701cce44460c1f8d86f4b5a81c7a94a62097bab734be685384
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 0.9769

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/free-roblox-apocservers-game-hack PDF link annotation
    • http://airrix.com/wp-content/uploads/fsqm-files/roblox-piano-sheet-hack_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/free-robux-earn-now_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/robux-tv-hack_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/best-free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/roblox-vehicle-simulator-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/how-to-hack-someone-on-roblox-2021-new-method_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/roblox-cheat-madcity_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/roblox-roblosecurity-hack_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/free-printable-coloring-page-roblox_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/can-u-u-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://airrix.com/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005084.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5084 24800 bytes
SHA-256: fc825d993df77ba1ca4805aa71cfacd43ae48b7328d4566b623a48a356673db5
font_01_sfnt_off000089b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off0000955b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955B 18236 bytes
SHA-256: 509f91899f36fab07843e53c9cb3a89e42bdbdd2229461c4f19e484e56a3ed28

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