Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b780d66aa0ad1a0…

MALICIOUS

PDF

37.5 KB Created: 2021-05-22 07:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 13e30055d70e9106c81c3ca3bfa6a7b5 SHA-1: 10e31de863b5415b0b50e8fc5a8ce3eb0178bcfc SHA-256: 7b780d66aa0ad1a05e3a720e6df0fe58829615e23e027feb5c0c7d931aa13628
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking malicious links, such as the one pointing to 'free-robux-codes-2021-game-hack'. The presence of multiple similar URLs suggests a phishing or malware distribution campaign. No scripts were extracted, but the overall structure and heuristics strongly indicate a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/free-robux-codes-2021-game-hack PDF link annotation
    • http://jakthund.org/images/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://jakthund.org/images/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://jakthund.org/images/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://jakthund.org/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jakthund.org/images/roblox-promo-codes-free-robux_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
font_00_sfnt_off0000340c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x340C 26748 bytes
SHA-256: 1b1c2df9f85fdd393e236056dabedea9b3062861692d44683d5e4578655780dd
font_01_sfnt_off00007041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7041 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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