Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea404ee44c4858cf…

MALICIOUS

PDF

39.5 KB Created: 2021-05-20 15:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e7d8fa665df6cff15eb9a070864c4277 SHA-1: b017532faaccffb1d207d93cc2e102cb17e20ca3 SHA-256: ea404ee44c4858cf849d36a6f4e8c37281117c4f58ae4ec3d40a3058a29b1732
200 Risk Score

Malware Insights

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

The PDF contains multiple links to websites offering game hacks and free currency, presented with a fake CAPTCHA lure to trick users into clicking. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/orewards-com-free-robux-game-hack In PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-no-verification-or-survey-2021_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
font_00_sfnt_off00002fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB6 25872 bytes
SHA-256: 893dd76f76b4542f7cc917c92942a190d7b5f350df88eedaf7ecbae3eb67967c
font_01_sfnt_off00006a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9B 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 18840 bytes
SHA-256: db65450964d7be290e65cdc2a92251ec8b560453bbe28e14c4f3d4713211f4b7