Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e5ec11c345ead0…

MALICIOUS

PDF

31.4 KB Created: 2021-07-19 10:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 56fa5dfda87ba20917224e8c41ab4f65 SHA-1: 0ef6c28cc11336f21db8a1cba535cc89e3b32694 SHA-256: 30e5ec11c345ead0baf773d5bf646adbf1a541c756589e058671c86552e2b16d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The ML classifier also flagged this PDF as malicious. The embedded URLs are designed to trick users into downloading further malware or visiting phishing sites. No scripts were extracted from this sample, but the presence of multiple malicious links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9404

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/479516143/minecraft-free-online-game-hack In PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-no-human-verification-2021_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
font_00_sfnt_off000029ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29AD 22204 bytes
SHA-256: 32c0f1d3214d5a9e27d3352b2349ac5b96ad1cad114320d563485c69d3ed01cb
font_01_sfnt_off00005aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEF 17644 bytes
SHA-256: d3a8b3d8bd2249c6206e1557dca74d08ec9c3b58c2328dc4779a04ae87c22ca2

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