Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2a5426ceaeb9ac…

MALICIOUS

PDF

31.0 KB Created: 2021-07-22 13:52:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 79da9cf082a88ae3da5ecc62aa79c44e SHA-1: 7af0536c8949e807c2ad275bd83f0112170b84f5 SHA-256: ce2a5426ceaeb9ac8412015ab35ebb3883837e887c96e0458825f6586be7eca7
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector infrastructure, masquerading as 'game hacks' or 'generators' to lure users. The primary malicious redirector URL is http://netcdn.tw/app/479516143/minecraft-server-hacks-game-hack. The document body also contains a call-to-action phrase, 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', further encouraging user interaction with the malicious links. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://netcdn.tw/app/479516143/minecraft-server-hacks-game-hack In PDF document text
    • http://www.siahotel.com/userfiles/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.siahotel.com/userfiles/files/free-tiktok-likes-generator_GM835599320.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
font_00_sfnt_off00002a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1C 21400 bytes
SHA-256: 449f5acfd821183bd7d5fec5852471c23a653ea277023fda8284e6e556e7aa8b
font_01_sfnt_off00005883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5883 17852 bytes
SHA-256: d08e9f99218473ecffc4f3e4fddc043c571e48cf04331ee5ff23a4dc6866f563