Malicious PDF — malware analysis report

Static analysis result for SHA-256 156aac274352c515…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 07:09:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 43359231ad3bddb8a9b7b10c0eb819fa SHA-1: c8b95cb1dbcd164ab139d67944c26abce558031e SHA-256: 156aac274352c5152a1342ecea4c84f68440fb4fc0c63096de8b4fd2d2ee4f31
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also embeds an external URI pointing to a suspicious URL, likely intended to download a second-stage payload. The document's content and heuristics strongly suggest a phishing or social engineering attack aimed at tricking users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-bling-bling-card-coin-master-game-hack
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-spins-in-coin-master-2021_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coinmaster-free-cards_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/reddit-coin-master-hack_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-mod-apk_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-hack-online-android_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-levels_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/can-i-get-robux-for-free_GM431946152.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/mc-hacks_GM479516143.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-coins-spins-on-coin-master_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-promo-codes-roblox_GM431946152.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-hack-xyz-2021_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-free-spins-april-2021_GM406889139.pdf
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/500-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c13.bin
22843f79302b8c0f25074976f8e3dffc50bb5153086ebadf6184a4e7bad16cf5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C13 24704 bytes
font_01_sfnt_off000084ff.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FF 2840 bytes
font_02_sfnt_off00008eb1.bin
badeae9d55bf39d9f494a82973880599056e8fc325ea5045f08d6a1cb132f119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB1 18464 bytes

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