Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aec94e480035adc…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 04:09:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 92717e4388f6836955e71f35e1223558 SHA-1: ed22c4214af5f4911bad3085c476ced879611886 SHA-256: 4aec94e480035adc46da604e5c4968794a2fe6ec4e064c2fcb7d900f6aa3847c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document utilizes an XFA form and contains numerous embedded URLs, all pointing to sites offering game hacks and free items, particularly for Roblox. The ML classifier strongly indicates maliciousness, and the document body reinforces the lure of 'free stuff' and 'hacks'. The primary URL, http://netcdn.co/app/431946152/how-get-free-stuff-in-roblox-game-hack, is likely the initial landing page for a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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/how-get-free-stuff-in-roblox-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/how-to-hack-pizzeria-roleplay-remastered-roblox-money_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-cheat-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/fly-hack-roblox-lumber-tycoon-2-francais_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-aimbot-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/admin-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pubg-uc-dark-web_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-obby-gives-you-free-robux-july-no-password-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-hack-no-human-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hacks-for-roblox-how-to-fix-them_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cheat-codes-roblox-id_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-game-free-download_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_off00002f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F51 22708 bytes
SHA-256: d2748a41b5d41fa38f86ae6b690fa35a735a294ff65f8176c24e56112d80960f
font_01_sfnt_off000061f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 19056 bytes
SHA-256: d1b2f2ae1c065a5af75e54e3a08b5fb54a194d9925235f77479792ad8555b48f

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