Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d55e73824e04fcc…

MALICIOUS

PDF

51.5 KB Created: 2021-06-10 21:54:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 030870eaeb5726044e693f4a532dba12 SHA-1: 08bc260e47ddd3df9a4ca74fdac2b019bd71a15a SHA-256: 1d55e73824e04fcc53a043456b3a5eb2f7ae1b45ca7fbfd6d7ae333821b770d4
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick users into downloading a file from the provided URL. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a focus on game-related hacks and cheats, which are common pretexts for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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.tw/app/431946152/hacks-for-mibile-for-roblox-game-hack PDF link annotation
    • http://d-cision.nl/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://d-cision.nl/images/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/wurst-download_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/mc-update_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/design-it-roblox-hack_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://d-cision.nl/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529B 25804 bytes
SHA-256: 76d7c825bff76d6b187f7b604cc5d1cc4176c44ab9c402c59b0ce2da4d6324bb
font_01_sfnt_off00008e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9841 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA552 18660 bytes
SHA-256: c4d2b01e3d696482de90ec70dbc9fa6be1af50b9763a9690362bdb19f77d0a3a

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