Malicious PDF — malware analysis report

Static analysis result for SHA-256 7640cb752132aac1…

MALICIOUS

PDF

45.8 KB Created: 2021-05-17 05:17:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a878cafbb20fe8373089c0da6e8090d5 SHA-1: 517b23705f54be87674eaf2c0d9ab929554b7a69 SHA-256: 7640cb752132aac1f7f8fe44dbf78b454efe43c7ba252eeca1f7aa928e01c528
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free in-game items for popular games like Roblox, directing users to external URLs for downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and callback lures indicates a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/free-roblox-glasses-game-hack PDF link annotation
    • http://bau-lk.de/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://bau-lk.de/images/how-to-get-free-cards-for-coin-master_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_003_off00004b47.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B47 26448 bytes
SHA-256: a5ec7227f0dfab17f3b57195a66149ed6358588fad481fb03fc793879cdc9673
font_01_sfnt_off000086bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BB 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off000090b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B7 18176 bytes
SHA-256: 386737a31fa3d96264dc0154356d7490aba16f4507b8f09c9fbd7971cb0a3539

Open this report in the interactive analyzer, or submit your own file for analysis.