Malicious PDF — malware analysis report

Static analysis result for SHA-256 39de9fda21a04b1f…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 08:47:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4e598ad8fdc0c72d4f2264128abef953 SHA-1: 1e8ca6d20d29a15a6d55e5085c28f8afca5afad8 SHA-256: 39de9fda21a04b1fa6040592c32156fc94a34bfa39886f9c06e3162de76709df
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/free-robux-generator-for-roblox-2021-game-hack PDF link annotation
    • http://pandaplast.com/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/cone-master_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://pandaplast.com/images/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://pandaplast.com/images/daily-coin-master-free-spin-link_GM406889139.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_off000048ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EE 24884 bytes
SHA-256: b7c56030f1686dab2b4799488d14a63affc08d2b89fa9229f88ae2ead61fe246
font_01_sfnt_off000081cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CB 18820 bytes
SHA-256: ebe9c90542e8fe2fea15c90130dc88571bff9717049b6ef0e566bae53a322baf

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