Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b7bcc8cdf7f9fd…

MALICIOUS

PDF

38.2 KB Created: 2021-05-23 21:52:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 67d153d70ea6f3c0820065f3a8cd43e6 SHA-1: e4babb4b6e91f1ae820fef19d8bf5063325905d6 SHA-256: d8b7bcc8cdf7f9fd56aeb9258bb0ff2026eba299d74443bc2bb73165597d4c7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a known malicious infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The document body and embedded links suggest a lure to trick users into downloading further malicious content, likely another PDF or executable. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/coin-master-15-free-spin-link-of-last-5-days-game-hack In PDF document text
    • https://ceiprevellodetoro.org/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ceiprevellodetoro.org/images/free-roblox-followers-generator-2021_GM431946152.pdfIn 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_002_off000037e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E1 26536 bytes
SHA-256: 27e6e92d936579c41ac14834fb4f4706f6430e87c65eab4600eb28345d95c640
font_01_sfnt_off000072d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D5 18644 bytes
SHA-256: 4144dbe1534d0325d37e4c6129895ddb34a2bc26123e242025982d4ceef1bd2b

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