Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a69069930248aa…

MALICIOUS

PDF

252.0 KB Created: 2021-07-05 23:30:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d6ee7c9bb386344e852b4d28ea9ad44c SHA-1: aaf559ee69b90d429506f37ae52e304ab74e37cd SHA-256: 39a69069930248aa502bf1b9b4ccda13725c38de92dd2ebde488bb7287ebd072
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1539 Steal Web Session Cookie T1078.004 Abuse Web Browser

The PDF document uses a lure related to 'Pubg Uc With Paypal' and impersonates the PayPal brand to trick users into clicking a malicious link. The link leads to a site that displays a fake CAPTCHA and offers a 'game hack', consistent with credential harvesting or MFA bypass attempts. The document's structure and embedded URL suggest it's designed to exploit user interest in online games and financial services for malicious purposes.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 8

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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: http://netcdn.tw/app/1330123889/pubg-uc-with-paypal-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://netcdn.tw/app/1330123889/pubg-uc-with-paypal-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-ferbuary2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-one-mill-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/youtube-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-website-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robloxcom-free-kkk_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-offers-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-cheat-table-mm2_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-admin-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-synapse-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-knife-capsules-check-cashed-v3-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-page-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-shirt-download-free_GM431946152.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_024_off000380e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x380E1 26284 bytes
SHA-256: 8f922ab5b7e72014abd954836b7b1936f333659f8d9a4ec7bb319eb3447b7e27
font_01_sfnt_off0003be7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE7F 19144 bytes
SHA-256: 84be403963ea69f673ff41c8ab16ed7b90d18aa7028878d666c9e3fdf8364750

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