Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fee5763c727f1e4…

MALICIOUS

PDF

42.2 KB Created: 2021-05-21 02:06:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ea5b93e20fe0d19bcd823796ff6e844d SHA-1: caaf3e5082ac79124d98eabf69e593e5bf12571f SHA-256: 9fee5763c727f1e454b7d126276424875c01707d691f53ddfcb30ae8e822983c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting a "free generator / game hack" lure. The embedded links and the document body text strongly suggest a phishing or scam attempt designed to entice users to click through to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8161

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/get-free-spins-coin-master-game-hack In PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000337b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337B 25076 bytes
SHA-256: 7d502c990ee3d68bc5de980bb174753885a42804207f11c692cf72bb2ab3c9c0
font_01_sfnt_off00006cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC4 4072 bytes
SHA-256: a856d826ccc3276df9dd3cecc04f44ae207dd1a7b0149514e58fdedf3b22f244
font_02_sfnt_off00007aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA9 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00008498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8498 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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