Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e809f3b116c3e6…

MALICIOUS

PDF

35.4 KB Created: 2021-06-27 18:54:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ffbd71b26b93e18b73320dc7747d55c6 SHA-1: cbf580524415d31755a5d6f03746eb292a2e2ecf SHA-256: 29e809f3b116c3e6cbfab73ec1ede68365d42bb4df388d96cef0dffec3cf1ff4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure of 'Free Robux Redeem Codes 2021' to entice users. It contains multiple embedded URLs, including one pointing to 'netcdn.co', which are likely used to redirect users to malicious websites or download further payloads. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and external linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/free-robux-redeem-codes-2021-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-with-survey_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-roblox-items-pastebin_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-robux-for-free-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-hacks-jailbreak-download_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hacks-for-roblox-lumber-tycoon_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-money-in-roblox-bloxburg-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-cheat-tower-defense_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-roblox-money-hacks_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
font_00_sfnt_off000032c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C7 22124 bytes
SHA-256: 7601dacce134abc5439f8536e3a7674be6fe0e4858d5ec811ded35a8ff12e4c6
font_01_sfnt_off000063fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 19552 bytes
SHA-256: 9e1dac473263c0de9d7d37a0c1ac97fc6faf5ff8611277a673aaa799431b51c3

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