Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac02471c65bf6cf…

MALICIOUS

PDF

36.5 KB Created: 2021-05-10 10:51:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3cf1606fda3eff311de6f3859eb0950b SHA-1: 33f337073243ca7f64981e325a86b4f9c8049b9e SHA-256: 2ac02471c65bf6cf4a8e50664ed30bf50150905846171ba5109b4befb018383b
130 Risk Score

Malware Insights

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

The PDF file contains a lure for a 'free generator / game hack' that redirects to malicious infrastructure. The embedded URL, https://netcdn.xyz/app/406889139/update-coin-master-free-spins-game-hack, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to exploit vulnerabilities or trick the user into navigating to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/update-coin-master-free-spins-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_off000034a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A2 24844 bytes
SHA-256: a6ceb0df3af9624175654f1092df0c20c347046d0f8003b6993f2d420530d80b
font_01_sfnt_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 18244 bytes
SHA-256: 27c09eb221378defc267f78e32d3c41c850d93aee8517152fbe062b354dcc493

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