Malicious PDF — malware analysis report

Static analysis result for SHA-256 672abad8a09c2047…

MALICIOUS

PDF

35.9 KB Created: 2021-05-10 10:55:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7a3c10453789a3869a8621656c8510e6 SHA-1: 0555edc0a8799b85f9c4cdee2b5220f7baa18fbf SHA-256: 672abad8a09c20474501ca4225af8ac99ac96bfac7bbc1db2fad103d7e38c8f1
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to a malicious redirector disguised as a game hack generator. The document body also contains a call-to-action phrase and the malicious URL, strongly suggesting a phishing lure to download a payload. No scripts were extracted, limiting further analysis of the payload's behavior.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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/cheat-codes-for-coin-master-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_off000032cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32CF 25116 bytes
SHA-256: b49ccc866919e404b8c45864201b5655ba1bf9d70b8a967f88e0708f3ce29b0d
font_01_sfnt_off00006ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA9 18052 bytes
SHA-256: c83c2968f9adc9e8284b9f918c7c7a0f7d3bbc65ccd05c6284fac2f5c017bb12

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