Malicious PDF — malware analysis report

Static analysis result for SHA-256 8528aa623e25c68d…

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 14:18:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1ab4c6971c4a92933d9904c2512da347 SHA-1: dc7765c4f0cf80d6807d374b24b7f1db7d6d76f1 SHA-256: 8528aa623e25c68d66a08866309204038d347ed1eb1c983c2da4a72fc9f29af3
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent link in its body text, all related to obtaining free items or currency for games. The ML classifier strongly flagged this PDF as malicious, and the presence of these links suggests a phishing or scam attempt. No scripts were extracted, but the document's structure and content indicate it's designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/406889139/free-spins-in-coin-master-without-human-verification-game-hack
    • http://dorfgaragethalwil.ch/images/websites-that-give-you-free-robux_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/minecraft-windows-10-edition-free_GM479516143.pdf
    • http://dorfgaragethalwil.ch/images/coin-master-free-attack-hack_GM406889139.pdf
    • http://dorfgaragethalwil.ch/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/how-to-get-2021-robux-for-free_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/robux-offers_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/roblox-script-executor-free_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://dorfgaragethalwil.ch/images/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://dorfgaragethalwil.ch/images/roblox-hack-tool_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • http://dorfgaragethalwil.ch/images/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/roblox-apocalypse-rising-hack_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/free-custom-minecraft-skins_GM479516143.pdf
    • http://dorfgaragethalwil.ch/images/free-promo-codes-for-robux_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/coin-master-free-spins-hack-ios_GM406889139.pdf
    • http://dorfgaragethalwil.ch/images/free-robux-websites-that-work_GM431946152.pdf
    • http://dorfgaragethalwil.ch/images/ways-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004945.bin
33e40294bd9c986302c67c55f7c080d15c4bcbb52812b16dc3be5c8e416c7f12		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4945 25376 bytes
font_01_sfnt_off000082cf.bin
c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 3560 bytes
font_02_sfnt_off00008f54.bin
2f08f52b73595fa95dbe25467555bd1443f7cdd3e7404a9db3231e6e64119a30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F54 18784 bytes

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