Malicious PDF — malware analysis report

Static analysis result for SHA-256 300f7ca263519253…

MALICIOUS

PDF

50.5 KB Created: 2021-06-07 09:05:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c957066a96616a4c62c9ce176cde4cea SHA-1: 6a5312dba018b44967346a1797c8c26a37d58cc1 SHA-256: 300f7ca263519253493871be16c07a2e9aa09cdc0a97d050bd4a89cea8e5a98e
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA lure to entice users into clicking a malicious link, which is a common social engineering tactic. The embedded URL and numerous other URLs point to sites offering game-related cheats or hacks, further supporting the lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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/how-to-get-free-money-in-mad-city-roblox-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-uc-pubg_GM1330123889.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/daily-free-spins-coin-master-heaven_GM406889139.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_004_off00005234.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5234 25880 bytes
SHA-256: 1254cc2624c615d2a2778c36e9ddb0a89abc46e17384a5ce5645b8f0244feb9b
font_01_sfnt_off00008e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E45 7436 bytes
SHA-256: 4a13d5d8cb047d0703728abd56fadd7857e02dd2d0bdc744bf23c6d558594edd
font_02_sfnt_off0000a047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA047 19116 bytes
SHA-256: a7a3d8f77c70a41b96902d4c87c6f8d99b827b8d8cf4be48cc6e6c9875ffd176

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