Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6268ec9a7b629e…

MALICIOUS

PDF

40.4 KB Created: 2021-05-22 14:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8830c9f19257eda8af29c6ac242f91a7 SHA-1: 501947d657c7bb401eed1fc9397aed085ce6f181 SHA-256: 3b6268ec9a7b629ec4414d4217669fcfcd7c4a2af70a55c96b5330be7418ec56
122 Risk Score

Malware Insights

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

The PDF document contains a lure for "free spins" on a game, presented with a fake CAPTCHA to trick the user into clicking embedded links. These links, such as https://netcdn.xyz/app/406889139/how-do-i-get-free-spins-on-coin-master-game-hack, likely lead to further malicious content or exploit kits. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7718

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/406889139/how-do-i-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://possumholler.us/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/cm-spin-link_GM406889139.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_off0000357e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x357E 24776 bytes
SHA-256: 785053d884ed5ced4e0007fa45bc330a3b00a113ddec85756a9975fcd3202ca8
font_01_sfnt_off00006dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFC 4368 bytes
SHA-256: 9c58ab413d3ddd346f1aa8563d7a7800793d52e85c595faa39aa61fda054b08e
font_02_sfnt_off00007cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDB 18216 bytes
SHA-256: 7b3dc5054b0587ec41e602859ac4e59ac97ec46c9406b1b4182074b4d7a08153

Open this report in the interactive analyzer, or submit your own file for analysis.