Malicious PDF — malware analysis report

Static analysis result for SHA-256 671698a691f280b3…

MALICIOUS

PDF

39.2 KB Created: 2021-05-22 02:22:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 414695339b960ec2df1864a6729cbed2 SHA-1: 77cd8b2850ae166a21fb277f88634ca51ff819a4 SHA-256: 671698a691f280b367cdff34ec048dab3eb29766fe02b182a174fb0052fde2f8
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating a fake CAPTCHA or human verification prompt, designed to trick users into interacting with malicious content. It also embeds multiple URLs, including one pointing to a 'how-to-hack' page, suggesting a lure to download further malware. The document body explicitly contains a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-hack-roblox-to-get-robux-game-hack PDF link annotation
    • http://aimp-market.ru/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/roblox-free-hair-boy_GM431946152.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_002_off00003457.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3457 24900 bytes
SHA-256: adf4cad1ee852267bae850895d486d6e6e1ace1297d86294535788424aada1a6
font_01_sfnt_off00006c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C46 2956 bytes
SHA-256: bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d
font_02_sfnt_off00007666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7666 18588 bytes
SHA-256: 6723e17a0e3ea7e17da9fa5ee91cb22fe0fa4706a6f3d09ae44dda015c08872b

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