Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab48b9db7fa270fa…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 09:14:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 30e216d3769972c2c828693bc9ecb957 SHA-1: d714de28074f7685ac990dcfc21bf09bd3678bab SHA-256: ab48b9db7fa270fa8188d188efd9cae370d84ae9487f4895eea56b97f72d1851
82 Risk Score

Malware Insights

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

The sample was flagged by an ML classifier and exhibits a fake CAPTCHA lure, indicating an attempt to deceive the user. The document contains multiple embedded URLs, including one pointing to 'netcdn.xyz', which likely serves as a landing page for a scam or to initiate a download. The presence of these elements strongly suggests a malicious intent to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-reward-link-game-hack PDF link annotation
    • http://fishtech.is/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://fishtech.is/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/robloxhacks_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/play-coin-master_GM406889139.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://fishtech.is/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004750.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4750 25184 bytes
SHA-256: 183cc656b3c2de7c842a77d0caef64a432b6b9ed9a79e474f37225dd44e3a3db
font_01_sfnt_off0000816f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816F 18056 bytes
SHA-256: c2793d17727503817a30064ba8beed92adc1bd6ab198ac538296771cbb61b552

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