Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d29878b87aa82b…

MALICIOUS

PDF

45.7 KB Created: 2021-05-12 12:00:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5caf3c1f1f2e488cd1be1645247dd532 SHA-1: 3f1ed7e31d0269119983147e4c619df543e3d9a0 SHA-256: 48d29878b87aa82b3d48ba2e53357ccc8773ce25def94673e2e82de9a35a7909
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL and other similar links, reinforcing the lure. The ML classifier also flagged the PDF as malicious. No scripts were extracted, but the primary attack pattern is a social engineering lure to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/free-spins-for-coin-master-game-hack PDF link annotation
    • https://www.beaufortcollege.ie/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://www.beaufortcollege.ie/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F8 28024 bytes
SHA-256: f9c9f3839b9563e5fc9b10ce4bab0625d972b630e9cac208a306c3818bf0f643
font_01_sfnt_off0000878b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000913d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913D 17884 bytes
SHA-256: 7a686c540965cac69e1923dfbb6a78ce3f92ec60dbbf6836da21cbb58cd4d6cc

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