Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ed9b3696cc4efa…

MALICIOUS

PDF

49.5 KB Created: 2021-05-16 13:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e696791ced3ae2bed4e75b65431f79ed SHA-1: 7c9667f11c5cfa09ee52b248bb935c1ed2c34064 SHA-256: 01ed9b3696cc4efa0fc2f118f23fc80a8b8ac4a86240c2843bd4b21c91b3e930
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector infrastructure, masquerading as a 'free generator' or 'game hack' to lure users. The presence of a fake CAPTCHA heuristic further supports the social engineering aspect of this attack. The primary URL identified is https://netcdn.xyz/app/406889139/free-spins-and-coins-blogspot-coin-master-game-hack, which likely serves as the initial stage for delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/free-spins-and-coins-blogspot-coin-master-game-hack In PDF document text
    • http://sfera-express.ru/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/robux-match_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A18 24296 bytes
SHA-256: 1fe071f0575b1144b0686d991591bf0a3995d59d25fe7024139cef370f7afec3
font_01_sfnt_off000081b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B95 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off00009dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAE 18636 bytes
SHA-256: f050b99fae15787f3dcd3a9ca1a9f1ede4f92304234d1532a9c4a0f9b5d220ed

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