Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afc39337b217b3c…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 05:43:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4f68334a07636a24edc7b2ea573f2533 SHA-1: 314646300636892a1e174ddff70b02bcae894b56 SHA-256: 8afc39337b217b3c6140926d12f1fe26b2031f30fa5c40a743a2e62e5fa37660
122 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and free spins, designed to trick users into clicking a link. The heuristic 'SE_FAKE_CAPTCHA' indicates the presence of a fake CAPTCHA or human verification prompt, which is a common social engineering tactic to encourage users to interact with malicious content. The embedded URL, https://netcdn.online/app/406889139/get-free-spins-in-coin-master-game-hack, likely leads to a second-stage payload or further phishing content.

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/406889139/get-free-spins-in-coin-master-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-coin-master-ios-no-jailbreak_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
stream_004_off00004ea5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA5 24816 bytes
SHA-256: 9e22aa0fc58aac1093e7994a64fc3597c77e7c5c61c1a119d9598fc4cb6100d0
font_01_sfnt_off000087e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E0 17884 bytes
SHA-256: 156f4ef702737132daa243a2c4fee8c0c13bec142009a1eebf0215f7cb8aef95

Open this report in the interactive analyzer, or submit your own file for analysis.