Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c2b273fa9f15f5…

MALICIOUS

PDF

33.1 KB Created: 2021-07-19 14:41:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76bab77b954e42dd36a5b94529ed447b SHA-1: 673d178ee275521b0482a92e975742789ebed034 SHA-256: d8c2b273fa9f15f59e2e9b21acc5f75ca042bb3c156b4d0a440b463580fe2a3c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free generator / game hack' lure. The document body explicitly contains the URL http://netcdn.tw/app/479516143/free-minecraft-bedrock-game-hack, which is flagged as a malicious redirector. The presence of multiple similar PDF download links suggests a campaign distributing potentially unwanted or malicious software.

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/free-minecraft-bedrock-game-hack In PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-no-scam_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
font_00_sfnt_off00002db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB8 22392 bytes
SHA-256: e56df312d39a666bb56380ceb962fdf6c3eb47a581888e6aa5bba8b4b023fa2f
font_01_sfnt_off00005f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 18268 bytes
SHA-256: d34bffa2112548f8729f10b9022dbaea9618b038b2dadf4195d892bf0ac95b27