Malicious PDF — malware analysis report

Static analysis result for SHA-256 6591f8e9246062bf…

MALICIOUS

PDF

250.7 KB Created: 2021-07-05 07:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8bf69d9e60b827e98c438d0d7535b017 SHA-1: de760994e10a9e257cbe4b561b9692ea037fc2bd SHA-256: 6591f8e9246062bf89983b767a0a0df3039e7d94a68131a7424b914324a5ef62
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic firing for a fake CAPTCHA lure, combined with a brand impersonation lure (Apple). It also links to a URL that promises a 'game hack', suggesting a social engineering tactic to deceive the user. The primary URL, http://netcdn.tw/app/1330123889/pubg-uc-png-game-hack, is the most critical IOC, likely leading to credential theft or malware download.

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-png-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-png-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/roblox-chromebook-hacks_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/inside-the-world-of-roblox-pdf-free-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/fortnite-roblox-play-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cheat-mine-simulateur-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pastebin-roblox-robux-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-many-hackers-are-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-dragon-fury-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/como-tener-robux-gratis-en-roblox-2021-sin-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-gold_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-114-4-download_GM479516143.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_off00037f06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37F06 25928 bytes
SHA-256: a19f146ee6e65b3316b60021461271c51471031588e9ac0ec25aa60c0f24115a
font_01_sfnt_off0003bc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BC1A 18124 bytes
SHA-256: 33fae9e6e6d3006362366caef91e3e5b74afb3f972a01fe198064627b016b32d

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