Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddf7c41cb00dd70…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 06:42:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9d5e4236e634eda00540ac87fce5368e SHA-1: 6310f8a0d98ecf0e88fc66b1f14700f252dca003 SHA-256: 0ddf7c41cb00dd70600c2b8389bbc68f163caf852e69c99b2e368e30d6f3744c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a fake CAPTCHA lure, designed to trick users into clicking through to potentially malicious websites. The primary link, 'https://netcdn.online/app/431946152/free-robux-mod-game-hack', suggests a lure related to game hacks or currency generators. The document body, though heavily obfuscated, contains references to 'Free Robux' and 'game hack', reinforcing the lure. No scripts were extracted, but the presence of numerous external URIs and the fake CAPTCHA heuristic indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/free-robux-mod-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-no-password_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-golden-card-in-coin-master_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
font_00_sfnt_off000050c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C5 26628 bytes
SHA-256: 6b19a008eecc09ba930cfbf5e7a90bb91821f561f1fd6647088cf6fae27f0e77
font_01_sfnt_off00008cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB2 18384 bytes
SHA-256: 1a22b4d0ddd13aadfbc34487f46de63ded67addff296de1d1ab8eef84ffc4180

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