Malicious PDF — malware analysis report

Static analysis result for SHA-256 533e9e166bc497e5…

MALICIOUS

PDF

44.6 KB Created: 2021-05-16 02:58:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c8be5c1877252cdf18d41161faa27ab4 SHA-1: 5599a9bdf77c74a5613b1a80b173ba833119c2d8 SHA-256: 533e9e166bc497e5b5608ba28547a6a9278e29c853b3b1b088e9561e17c4526c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a lure impersonating the Facebook brand, directing users to a URL that offers free spins for Coin Master. This is a common tactic for credential phishing or distributing further malware. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/free-spins-for-coin-master-on-1-19-19-game-hack.
  • 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-for-coin-master-on-1-19-19-game-hack PDF link annotation
    • http://greenoase.be/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://greenoase.be/images/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://greenoase.be/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://greenoase.be/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000486c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486C 25260 bytes
SHA-256: 15c1640d3bbae559cdfd1618c9ec4dc5e043bb1237ba96f6b8c9567f8f820123
font_01_sfnt_off0000822b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C15 18156 bytes
SHA-256: b0a36ecb2e3994d8896217b2a143a3ffdf588c2d696638deb18a4d2fea054774

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