Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba20474c0c592356…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 05:23:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 08513efc859d8376218d1d46d8c5c319 SHA-1: 13279ab595511ab3997b41edeebaa563eca71d84 SHA-256: ba20474c0c592356c01c6da8dd3817e415797695268a5ba88ea8e67052cdd99c
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 0.9865

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.online/app/431946152/real-free-robux-generator-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-diamonds-coin-master_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
font_00_sfnt_off00004fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC9 24468 bytes
SHA-256: 9792e037004ec1dc438f39a05233598739ed2916568c75e8417187fa428f9265
font_01_sfnt_off00008788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8788 18420 bytes
SHA-256: 14d46e1fdea56b33fc0f11521403768098913a132f51569f9b7a46a3ad47c201

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