Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d26b89201b3ceea…

MALICIOUS

PDF

47.9 KB Created: 2021-05-10 21:14:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a1fb66e95bdefdeaa54d65f02e17a150 SHA-1: ace87d58a8f9fa423d53a28405f012dd64128016 SHA-256: 1d26b89201b3ceeaf2b1f4b18601f0e0a3d5dc5093aa1744d410d6c96f0daf30
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a large number of external links, many of which point to SEO-optimized PDF files related to game hacks and cheats. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-hack-download-game-hack, likely serves as a landing page for malicious downloads or further redirection. The document's structure and content strongly suggest a phishing or scamming attempt designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-free-spins-hack-download-game-hack
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-coin-master-coins-and-spins_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-spins-coins-coin-master_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-roblox-toy-codes-2021_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-game-hack-app_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-phantom-forces-hack_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/blogger-coin-master-free-spins_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-gold-cards-for-coin-master_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-claim-spins_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-can-i-get-minecraft-for-free_GM479516143.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-gift-card_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/claim-free-robux-button_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-studio-free_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-cheat-to-get-free-spins_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-hack-download-pc_GM431946152.pdf
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-coins-and-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_off00004db8.bin
e2290b53cfb387353dafc5f5c4b4a9efcee4d55d6ef0b2e8f0e6f50ba78ce5cb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB8 28632 bytes
font_01_sfnt_off00008e0e.bin
fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0E 2812 bytes
font_02_sfnt_off000097ae.bin
da694bd0fa69da9f205a2bf67330739d542643c12690bfff988ed45d7c82aeae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AE 18636 bytes

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