Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dc95f5c41e271b…

MALICIOUS

PDF

32.1 KB Created: 2021-07-19 02:23:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6123476f165b82986a3b35b0ca73e67e SHA-1: 34944f871201fa349447cdd7b31a86bae1cf6fd3 SHA-256: 15dc95f5c41e271b04c9950dea404c44ace7d62fc8a930489ed4e2f7c5b041f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free game items or generators. The document body explicitly contains a call to action to 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', reinforcing the lure. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9532

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-server-hosting-24-7-game-hack In PDF document text
    • http://henrikedmark.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://henrikedmark.com/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/free-views-on-tiktok_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_off000029fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29FC 22264 bytes
SHA-256: d808f42915e51104e6fdecf90970d1d9180ae9387062b52c1dd6fbaa2f3c6661
font_01_sfnt_off00005b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B35 18352 bytes
SHA-256: 91a7490c887560cf1db9cb18ebb1e2a98db2d1ca6a1740dfb9f9cb38742cb9c1

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