Malicious PDF — malware analysis report

Static analysis result for SHA-256 654a3c1778ada733…

MALICIOUS

PDF

35.2 KB Created: 2021-07-19 04:53:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1bdff0edf4aec89235b7c77d7e9fc9b SHA-1: 78c6590fab0af2cf815c4ab613ad32c09b3879e7 SHA-256: 654a3c1778ada7335f978f9b71681c4f24e3a09704daa84dae520fa71baa8488
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game hacks and generators. The primary redirector, http://netcdn.tw/app/479516143/free-online-minecraft-server-game-hack, is a strong indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9294

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/free-online-minecraft-server-game-hack In PDF document text
    • http://vostokbg.ru/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://vostokbg.ru/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://vostokbg.ru/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://vostokbg.ru/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://vostokbg.ru/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://vostokbg.ru/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://vostokbg.ru/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://vostokbg.ru/images/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://vostokbg.ru/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://vostokbg.ru/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7A 22992 bytes
SHA-256: bcfedd7a65948437ef18dd4022564dbb50bbb47149ec4a4e44ca09ca790035cb
font_01_sfnt_off00005ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off000068f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F3 17756 bytes
SHA-256: 14377ac3d18db81ff7447bb693ccee55c7f80471e2aeaf98ca779f1b2357c71e