Malicious PDF — malware analysis report

Static analysis result for SHA-256 335dab527797195f…

MALICIOUS

PDF

35.8 KB Created: 2021-05-16 06:35:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e02ec84f152b1f212fd3ad074e4b9cbc SHA-1: aa52df08092a145ca9d0cb004a9b4b00408799b6 SHA-256: 335dab527797195f7795144e399741be1ccd16ea2870390f3caa2685ec2ad7ce
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for a "Coin Master Free Spins" generator, which redirects to known malicious infrastructure. The embedded URL is a known malicious redirector, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious redirection, hence the T1059.007 technique.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-for-today-game-hack In 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_off0000312a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312A 24948 bytes
SHA-256: a66379af659ff924bcd39a5d75bdfe91f3b7bfa2aba6cdb8776a368524be0354
font_01_sfnt_off00006a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 18240 bytes
SHA-256: a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20