Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd8c1dca585f420…

MALICIOUS

PDF

44.2 KB Created: 2021-06-04 02:33:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9ce8d02f302438c5e3fd391916e3c231 SHA-1: 6a4ae32b5a5f499bd97bb6b07cf5bfebbaa9897d SHA-256: edd8c1dca585f4202a1f3378a5a27d3f90c17cb8ea38c09e0bcabc205678b9e1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents itself as a lure for "Free Robux" and similar in-game items, a common social engineering tactic to trick users into downloading malicious files. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it may lead to further malicious downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.online/app/431946152/free-robux-sites-2021-game-hack
    • https://library.um-sorong.ac.id/repository/free-coin-link-coin-master_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/legit-coin-master-hack-without-verification_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/actual-free-robux_GM431946152.pdf
    • https://library.um-sorong.ac.id/repository/roblox-arsenal-hack_GM431946152.pdf
    • https://library.um-sorong.ac.id/repository/coin-master-free-pin_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/robux-fun-hack_GM431946152.pdf
    • https://library.um-sorong.ac.id/repository/minecraft-for-ps3-free_GM479516143.pdf
    • https://library.um-sorong.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/free-coin-master-spin-app_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/how-can-you-get-robux_GM431946152.pdf
    • https://library.um-sorong.ac.id/repository/my-roblox-avatar_GM431946152.pdf
    • https://library.um-sorong.ac.id/repository/oprewards-robux_GM431946152.pdf
    • https://library.um-sorong.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdf
    • https://library.um-sorong.ac.id/repository/free-robux-app-real_GM431946152.pdf
    • https://library.um-sorong.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • https://rblx.land
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005101.bin
f952b48b2c932ff59c5560fe48728ab4bcd714af662f38bf26a17da9f863fb5a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5101 24696 bytes
font_01_sfnt_off000088d7.bin
b8260c20a5a482fa631977c1895ef4fabb59c0a91f65cf95745fb521070d0a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D7 18640 bytes

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