Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96d951fc5f5b32c…

MALICIOUS

PDF

43.7 KB Created: 2021-06-14 02:09:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6c700aee759ecb8027ff73eb05ed5b80 SHA-1: a4f0cf447a4eb810840bbbcf78932f53fbfd2316 SHA-256: c96d951fc5f5b32c0d77e1253c19fc45537bedfe61299055048ae5f66104209c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site for potential malware download or credential harvesting. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/get-free-robux-no-inspect-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-exploits-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-suit-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-de-roblox-para-atravesar-cosas_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-in-roblox-without-a-generator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-into-getting-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-a-roblox-account-using-inspect_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-case-clicker-cheats_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-verification-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/testing-5-ways-to-get-free-robux-it-worked_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-robux_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
stream_003_off00004c24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C24 26176 bytes
SHA-256: e9b093060f83398a920ce8ffdfb78892bb59f7aadf3adcfad7442f9115b2de0d
font_01_sfnt_off00008896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8896 18292 bytes
SHA-256: 06e6a1d3c7ef299e405f96ebb83bac06bf187e5a05a5b07b0464701e176332d0

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