Malicious PDF — malware analysis report

Static analysis result for SHA-256 1173d3517503a374…

MALICIOUS

PDF

39.1 KB Created: 2021-05-21 16:34:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1a76e015e588b6c8346ea93278446d72 SHA-1: ba60d7074a2d310d5eece7178f47301f0da69c69 SHA-256: 1173d3517503a3745af32b8951f535342fadd56834f47083f27042acc2ae4c4e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document displays a fake CAPTCHA and includes a call-to-action phrase, aiming to trick the user into clicking a malicious link. The ML classifier also flagged this PDF as malicious. The embedded URLs point to potentially malicious content, likely a second-stage download or exploit.

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/835599320/tiktok-comments-free-game-hack PDF link annotation
    • http://webstan.be/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-spins-cheat_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000317d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317D 27040 bytes
SHA-256: 43473a1c16728967c30b7a2a14e06244d6f876d2cde1c0e5f71fa2678c67bc78
font_01_sfnt_off00006e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8E 3000 bytes
SHA-256: 56ee3cf210babcab1d595ec3cc7d666f7a646b8ea00ab1e6563ebd84f84582f8
font_02_sfnt_off000078ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78ED 17716 bytes
SHA-256: 7d11e26bc137394c80b9b8e9d0677cc530b42dd3bf172d18943544e921c1513e

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