Malicious PDF — malware analysis report

Static analysis result for SHA-256 690681b0a30362a5…

MALICIOUS

PDF

38.5 KB Created: 2021-05-23 17:47:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3eace76f020750de0648101b7171423c SHA-1: cc7378f83fa24cc1bf4905897bed7cbcdd9b7203 SHA-256: 690681b0a30362a54ab36e8f632ee6606d8edf9c9179c3544cd954c82b34786a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure and multiple embedded URLs, including one pointing to a site offering 'free robux'. The ML classifier also flagged this PDF as malicious. The presence of these elements suggests a phishing or scam attempt designed to trick users into clicking malicious links or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/how-to-get-free-robux-without-doing-anything-game-hack PDF link annotation
    • http://loriginedupain.org/images/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://loriginedupain.org/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://loriginedupain.org/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C1 26952 bytes
SHA-256: 8ef718d78bcf6b4421caf00e1e712a0ac03f995d27ab425fab940ea97becc6a3
font_01_sfnt_off0000720c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 19400 bytes
SHA-256: 843e7c6de0628ecb74dfde19cdfb212261a67f0d6d996bc16e2547f6c0bce3d3

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