Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c2062dee0909d7…

MALICIOUS

PDF

250.7 KB Created: 2021-07-06 10:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1613d6d5ec86c896d7245f6ce7aa165f SHA-1: 2b1cdd8a72b4b94197ce2607b96f5a56fc897718 SHA-256: 92c2062dee0909d782bfadd119a061964a66b9f4c77c919ffe949ca12baea08d
140 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a brand impersonation lure, specifically targeting Apple, to trick users into clicking a malicious link. The embedded URL, http://netcdn.tw/app/1330123889/pubg-50-uc-game-hack, is presented as a call-to-action, likely leading to credential harvesting or MFA abuse. The document's content and heuristics strongly suggest a phishing attack delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 7

  • 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-50-uc-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-50-uc-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-into-builder-mans-account-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-hair-roblox-not-moel_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-the-chat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/baixar-hack-roblox-winrrar_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-catalog-items-on-roblox-vortex_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/your-free-trial-of-living-has-expired-roblox-meme_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/comment-cheat-les-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/kaio-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-empty-roblox-alt-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/noclip-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-deutsch-download-2021-link_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
stream_024_off00037e25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E25 25928 bytes
SHA-256: 45e66a2ec4da6369eb9816b5338084e8930d42fd924b58132cf92e990fb9891b
font_01_sfnt_off0003bb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB40 18432 bytes
SHA-256: 6583440aee6ea53eedde42c2fe193da77d9d7cd76466d2709d3ebccd9603f04c

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