Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd1bef75732cd8e…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 11:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cdef5a8fee3f76c1ed3d519e782844f8 SHA-1: c5bc852154701fea8d4fc934ea42239da30b73cc SHA-256: efd1bef75732cd8ec759cc58c5e0122ce531d3b49636c3fc3e0f65677f1292f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/479516143/best-free-minecraft-servers-game-hack, which is presented as a lure for game hacks. The document body and embedded URLs further reinforce this lure by referencing free game-related content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/best-free-minecraft-servers-game-hack In PDF document text
    • https://bf-sozidanie.ru/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/free-robux-co_GM431946152.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://bf-sozidanie.ru/images/is-minecraft-education-edition-free_GM479516143.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_off00002d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0A 22340 bytes
SHA-256: 65d887feb0fba4ed8dcb141b51971a7c2dae12dbdb1475d5c5f167e41d672e9d
font_01_sfnt_off00005e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E01 17896 bytes
SHA-256: c529f757d6b4a4f9c7840ecb5b6035c813da3045ee3b560268268dab20db1aa9