Malicious PDF — malware analysis report

Static analysis result for SHA-256 832b28064e2e7f60…

MALICIOUS

PDF

47.5 KB Created: 2021-05-14 02:50:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d2b0b2030fed13f80fa9f44a5e600e3f SHA-1: 69ff0ee3bcd39b6db2bfbde1baa65f66ea381821 SHA-256: 832b28064e2e7f60f20d5afa18713007409279d345eb84c2741e22872a34e59b
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA lure, aiming to trick the user into interacting with a malicious link. The embedded URL, https://netcdn.xyz/app/406889139/free-coins-coin-master-link-today-game-hack, is likely a gateway to a scam or further malware. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for malicious purposes, potentially leading to client-side execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-coins-coin-master-link-today-game-hack PDF link annotation
    • https://www.cosmosdawn.net/images/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/roblox-free-robux-hack_GM431946152.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_off00004adf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ADF 29236 bytes
SHA-256: 0cbd53deae4191f70b7089fbb9c0a5940eb69de7efe3a2dbd222ba3671074030
font_01_sfnt_off00008d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D48 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00009733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9733 18232 bytes
SHA-256: 919e3931629c19f2cd0ae6f6c09285b8d44d14b54c37a6bb98ea3e4a7cef2171

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