Malicious PDF — malware analysis report

Static analysis result for SHA-256 2884aa02a1a362a3…

MALICIOUS

PDF

34.1 KB Created: 2021-05-23 14:49:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d2fc30e568c5543bfc03b54bc07f4eeb SHA-1: 08a69be946b1b99b4b0c7dab624d4c89a0c5d647 SHA-256: 2884aa02a1a362a399739621c9c857810a746fd49e02d5f4a7f774ac142e2b86
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a prominent call-to-action button, directing users to download content from malicious URLs. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the fake CAPTCHA strongly suggest an attempt to trick the user into downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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-free-views-game-hack PDF link annotation
    • https://pompesfunebresleveque.fr/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://pompesfunebresleveque.fr/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://pompesfunebresleveque.fr/images/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://pompesfunebresleveque.fr/images/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pompesfunebresleveque.fr/images/free-robux-by-watching-ads_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
stream_002_off00002f3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F3C 23748 bytes
SHA-256: 19c3bf4baaa1c8eb43a9a1486b80ceb41d5389997d72862f1fa1bb960b41fa20
font_01_sfnt_off00006535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6535 17752 bytes
SHA-256: c0458c8281c5f614ec80a73af60f82da894f7f0cb4b38fcd4688d4eb1216e853