Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5df0c22354a150…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 13:19:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3442f15821c4ee0d61257387ae928139 SHA-1: 80619c3a17e1cc7996eba5d53e235c908a46bac8 SHA-256: 1d5df0c22354a1505b018a8fc88d287279e7a06ea23449ca921073d767de99ca
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a lure related to 'free game hacks' and 'generators', strongly suggesting a phishing or scam attempt. The primary URL, http://netcdn.co/app/479516143/how-to-get-minecraft-for-free-on-chromebook-game-hack, is directly linked to a high-severity heuristic firing for game hack redirects. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow designed to lead users to potentially harmful websites.

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/479516143/how-to-get-minecraft-for-free-on-chromebook-game-hack PDF link annotation
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-nijna-legends-hacks_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-download-minecraft-hacks_GM479516143.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_off000033ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EC 22348 bytes
SHA-256: 1eac4ea891cdd4c12fd96d646724c554ebdc3bc66b9e0f4ab19b06d4127e7465
font_01_sfnt_off0000655a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655A 18916 bytes
SHA-256: a6c15671334e5340958c859e9ef76faa3bd94e6af761e25462b4f2cfb72507dc

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