Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a53edbb729c36b4…

MALICIOUS

PDF

38.8 KB Created: 2021-05-11 22:14:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0e710ec169f8b85e178f2a3d16818099 SHA-1: 2e8e01c1f694f052e2e327585be04c8ef0b53c02 SHA-256: 9a53edbb729c36b4b55e72a00c0b2a4df2007ca61993751be087292b22691053
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, linking to known malicious redirector infrastructure. The embedded URL and document body text reinforce this lure, aiming to trick users into visiting a malicious site. No scripts were extracted, but the primary attack vector appears to be a phishing lure via a malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/431946152/earn-points-for-robux-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_off00003337.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3337 28724 bytes
SHA-256: 0f3ac2c018d19c9a1b1011d4336f7b8d7dd8f18bc9a33e3beddb5a84aa42b317
font_01_sfnt_off0000759e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 18620 bytes
SHA-256: c017815f7eb6531c9e4acdde9d92c09258657893b573c7da0b65812d86d29b72

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