Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fb72358df2b783…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 20:05:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 212fe1391c51798bd89e00695d6ee618 SHA-1: d2b3f62da34cce76a3fe84b8f3e45a10e1d517b2 SHA-256: 14fb72358df2b78344b2e7f153d5987e2d072ce432cd27fe5030199b74b3e89e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document contains numerous URLs and text strings related to free in-game items and hacks for popular games like Roblox, indicating a lure for users to download potentially malicious files. The presence of external URIs and a high ML classifier score strongly suggest malicious intent. Although no scripts were explicitly extracted, the document's structure and content point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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-stacked-roblox-arsenal-account-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/free-robux-stuff_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-5-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/no-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/dll-script-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-gucci-jacket-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-do-you-get-free-skins-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/wwwget-free-robloxcom_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-apocalypse-rising-hack-dll_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.aIn macro / runtime command snippet
    • 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_off00002e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E16 22140 bytes
SHA-256: 9ff34dd79c088b2a7b3478008bc68cd231986f57ba022459da1af3d5ac9e5176
font_01_sfnt_off00005f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4C 19240 bytes
SHA-256: 361ec804582a18f64795d0cf9e73409b15bd6733680958d059e7772ff99e2865

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