Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc3c295e1d8fcee…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 12:50:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 72ebdfe3d5661592831f34ae413be7a5 SHA-1: 7f48703b1ee3570256d70d63dde18683bbe143f4 SHA-256: 2bc3c295e1d8fcee299b8cc7d3161adfebff95d35097855313a9554be1e114fc
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed to trick users into clicking links that promise game hacks or generators, impersonating brands like Microsoft. The document contains a large number of external links, many of which are structured as SEO link farms, and one primary URL that appears to be a redirector. The presence of a fake CAPTCHA heuristic further suggests a social engineering attempt to coerce user interaction, likely leading to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-get-real-robux-game-hack.
  • 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/how-to-get-real-robux-game-hack PDF link annotation
    • http://cintabaca.org/katalog//repository/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-coins_GM406889139.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
font_00_sfnt_off00004c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C46 26264 bytes
SHA-256: 650d1b526914f860a51c216f5d5e9a5c1eee501d846198949b3011a892b796bd
font_01_sfnt_off000087f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F5 18420 bytes
SHA-256: c00d446c8157095122135a55285e302a912096a3f0aa6b81bb2c06de09994ea7

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