Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f88af4d7ea9179d…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 04:32:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 29341bbcf280b866d7efeee2811e18f7 SHA-1: e3b25ef255572855147eed4c44b3f496d2b92824 SHA-256: 8f88af4d7ea9179d40b60eb7b0b32c53e165915dea0846b7427636710c356724
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a heuristic firing for a payment redirection lure, suggesting it is designed to trick users into downloading malicious content. The document body, though heavily obfuscated, contains references to game cheats and hacks, aligning with a social engineering pretext to encourage downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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 https://netcdn.tw/app/431946152/cheat-codes-for-roblox-skywar-how-do-u-get-costums-game-hack
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-apocalypse-rising-hack_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-booga-booga-hack_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/cm-free-spins_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/freerobux-hack-us_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-app_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-coin-master-spins-daily_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-do-you-install-minecraft-for-free_GM479516143.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-app_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/freerobuxhack-us-2021_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-robux-on-phone_GM431946152.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-hack-co_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-coin-master-s_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-do-we-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053f9.bin
84f6843f7609c31947895aed8750e3a61f71d65f8592835893073c181695629d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53F9 28600 bytes
font_01_sfnt_off000093cc.bin
d94abef8f4bcc3f287300709b01166d54bffc0b1d261e959e010eeb6328f859b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93CC 19888 bytes

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