Malicious PDF — malware analysis report

Static analysis result for SHA-256 54315f57c6e8b7a4…

MALICIOUS

PDF

47.1 KB Created: 2021-05-12 11:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1c01d9a6b3fc30dc66adeead9dd353d3 SHA-1: fb1031085f02978e09b0d391e4173b9fcce89ada SHA-256: 54315f57c6e8b7a4a022c6a6bb994002273f1b026810cd037187f5d7104b7a36
140 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link and displays a fake CAPTCHA to trick users into downloading an application. The embedded URL points to a domain known for distributing potentially unwanted or malicious software. The document's content and heuristics strongly suggest a social engineering attack aimed at users seeking game-related downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8619

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-3.3.2-apk-free-download-game-hack In PDF document text
    • http://somvisio.es/images/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://somvisio.es/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://somvisio.es/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://somvisio.es/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://somvisio.es/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://somvisio.es/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://somvisio.es/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://somvisio.es/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://somvisio.es/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://somvisio.es/images/earn-robux-today_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_003_off00004867.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4867 24276 bytes
SHA-256: 42bbdc551c0875a8675a9cb615cafe8e9aa26f684339e20e7d17b1f316404a2b
font_01_sfnt_off00007ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA4 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8855 19000 bytes
SHA-256: 784b1e1b1d240dab4fb966bf2beaa9dcc272aea1979d30251c3bbe87cc6a5b4c
font_03_sfnt_off0000ac8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8D 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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