Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d4d4d7e929a7ae…

MALICIOUS

PDF

45.0 KB Created: 2021-05-16 02:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 30e7c387eb180c5222bbc4ccf94443a8 SHA-1: 0939a05d4b84804aa6904330a83a50a632945caa SHA-256: 58d4d4d7e929a7aee945579fd7180039d69dbdac53b4e3bb1146afcf378d2004
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, directing users to click on embedded links. One such link, 'https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-blogspot-game-hack', likely leads to the download of a second-stage payload. The ML classifier also strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/coin-master-daily-free-spins-blogspot-game-hack
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/coin-blogspot_GM406889139.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/robux-codes_GM431946152.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/free-robux-easy_GM431946152.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/minecraft-pocket-apk_GM479516143.pdf
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/how-to-get-free-shirts-on-roblox_GM431946152.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/impact-minecraft-hack_GM479516143.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/avatar-de-roblox_GM431946152.pdf
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/500-free-spins-coin-master_GM406889139.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/roblox-zone-free-robux_GM431946152.pdf
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/wurst-download_GM479516143.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdf
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/free-money-links-coin-master_GM406889139.pdf
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/roblox-accounts-for-sale-free_GM431946152.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/minecraft-clipart-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e19.bin
a81826e16179017fd341df549ede441036e44849bd3b34cbdbd7044d107e9cc0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E19 29352 bytes
font_01_sfnt_off00008c5b.bin
99efaab321cd8bd4771148dad361c5d136942e4fae15d22f58752892cb19a04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5B 18812 bytes

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