Malicious PDF — malware analysis report

Static analysis result for SHA-256 4870dbd735dbd37c…

MALICIOUS

PDF

36.6 KB Created: 2021-05-13 01:02:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 38d69976e7f13b6a5c5879409c3e5405 SHA-1: 7c722227963e6f022d00aeb5075f64e7ceef4fed SHA-256: 4870dbd735dbd37cd8d623ed9bf2fe0970aa2e6a41d43352639c906c72567dfd
130 Risk Score

Malware Insights

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

The PDF contains a lure for a game hack generator, with a prominent call-to-action button. The embedded link directs to known malicious redirector infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction to redirect them to potentially harmful content.

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/como-hackear-coin-master-en-espaol-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_off00003556.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3556 25204 bytes
SHA-256: 6dfa274a4d92299c9bc130fe22ef933a570c24d9bc79f05a6e4706f655220830
font_01_sfnt_off00006e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 18224 bytes
SHA-256: 123f8386315a91293958179ffe58ecd8d69104faea04a921c44476c066c42c52

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