Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdeafead6dd3c34f…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 09:48:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 68d4569dfc3bf3e9ec78bbc2cecbd171 SHA-1: 669dcae7d200acea8680c000a3edce16b0396bb2 SHA-256: bdeafead6dd3c34f4315a35065fcff8f660a7dea6f9416adc646f178d35dd26c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are presented as download lures for in-game currency or cheats for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/earn-free-robux-roblox-win-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-catolog-items-may-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-robux-giver-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-a-roblox-profile-youtube_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-900-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/counter-blox-roblox-offensive-wall-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-counter-blox-esp-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-uncopylocked-roblox-games-meganz_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-and-tix-codes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/noob-invasion-roblox-get-free-exp_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_off00002daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAF 22464 bytes
SHA-256: dffe8543ed54df6794ffdf304cea25d159f43f8e0004acdafdd80115be76d53c
font_01_sfnt_off00005fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC4 19108 bytes
SHA-256: ded03f16a2f0a4d5f09b4457b93d763d7372819a93dbb9599995c39f90afe082

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