Malicious PDF — malware analysis report

Static analysis result for SHA-256 87480957a2bfefa6…

MALICIOUS

PDF

24.4 KB Created: 2021-05-11 15:31:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3a434038f89f0c087369809dc9d4eecc SHA-1: e1b00ccefc9e9059bdcf29a6851c92eb23497840 SHA-256: 87480957a2bfefa6090a0544ace429d08d08a5008f8b4cd5af920e204e336323
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a 'free generator' for a popular game, which is a common lure for phishing or malware delivery. The link redirects to a known malicious infrastructure, indicating a high likelihood of user compromise. No scripts were extracted, but the PDF structure and embedded link strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7908

Heuristics 3

  • 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.
  • 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/free-coin-master-coins-and-spins-game-hack In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003434.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3434 19456 bytes
SHA-256: 0adeaf3595c9ee6e4578e5fd61589862cd3e0d7da4c8bb288d00193772d24c36

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