Malicious PDF — malware analysis report

Static analysis result for SHA-256 be89cae3ec34acda…

MALICIOUS

PDF

35.6 KB Created: 2021-05-10 14:10:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b2f1c98ab1c86a4a14163dc290477ec3 SHA-1: 478a78268c3eacc21c33ede846143f214869e9c3 SHA-256: be89cae3ec34acda8e427c1258a5f7452ecb6ccc30fb55681d11a70725b1cf3b
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The embedded URL and the document body text reinforce this, indicating a phishing attempt to trick users into visiting a malicious site. While no scripts were extracted, the nature of the redirect suggests it's intended to download a second-stage payload or lead to further compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0282

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/spin-coin-master-free-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
stream_003_off00003249.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3249 24724 bytes
SHA-256: 48895a8b8ac4523f58e1eba8ca429fba397d0ef98cf5a383dc2c389ca4e8d86b
font_01_sfnt_off00006aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 17884 bytes
SHA-256: 6361ede382a163d704ed6c8f102c2990305f9cba1a2540397fd15e2a8f655622

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