Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe44cbaba52579b…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 06:32:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 60eb46e28ba4b9c0ea90343b3d255afb SHA-1: 8d69ea80265742ba5e5850cc7d0c6cb177435fc2 SHA-256: 9fe44cbaba52579bac371d7f2251d13f8d396c11940818824177e3afb6a080fe
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains numerous embedded URLs and a prominent link in the body text, all related to obtaining free in-game currency or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of download lures and callback lures suggests a phishing or scam attempt. The primary goal appears to be directing users to download potentially unwanted or malicious applications from the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-no-verification-2021-game-hack
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-hack-no-survey-com_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-free-accessories_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-free-wad-exploit_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/script-executor-roblox-free_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-skin-free_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-app-hack_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/hack-robux_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-real_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-trolling-with-hacks_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-how-to-get-clothes-for-free-2021_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/win-free-robux_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/minecraft-free-install_GM479516143.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-roblox-clothes-codes_GM431946152.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-apk_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/minecraft-ps4-free_GM479516143.pdf
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003044.bin
f8c8f978bebaf22c10cb04ea6d82286416f9b039d983dcbf0d2b8c7bf6947799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3044 22288 bytes
font_01_sfnt_off000061cd.bin
0ea569e2458714af2fc88272f668bb9559ca065cecd410792851a624a05e4648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 19476 bytes

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