Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade6b25c38ae33ce…

MALICIOUS

PDF

36.7 KB Created: 2021-05-11 01:32:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1363af7686618fd8f8599b60d1d02abe SHA-1: c3ddcd8c7773190098388bf6282b754eb596f873 SHA-256: ade6b25c38ae33ce9f64d80e4f590b2e7d83fa9ac92fd56894856868474ccef9
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a fake CAPTCHA lure and a malicious redirector link pointing to a site promising free game currency. This indicates a social engineering attack designed to trick users into visiting a potentially harmful website. The embedded URL is the primary indicator of malicious intent, likely leading to a scam or malware download.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/blogspot-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_off000033de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33DE 25716 bytes
SHA-256: bbc15d799fc1370e33687832ed9b24cec2bebbd1e0a7b8606c96e284e553a41c
font_01_sfnt_off00006d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 18464 bytes
SHA-256: af5d8a2e7c6ce5c46c231007036c3c30da92f088fd5d2b237af1a5c438451922

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