Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a56cef7b619d00…

MALICIOUS

PDF

31.7 KB Created: 2021-07-19 02:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6328999a5df2b63a23bfa48bb1dee3a7 SHA-1: 933ce4c3aff909d8ba74a21d1527c4aa0475e7b4 SHA-256: 72a56cef7b619d00fb8aa3dfcd427f4673bdb38d19dbbf6fc1b88a0ccd8d330b
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hack generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate a phishing or malware distribution attempt. The document body and embedded links suggest a lure for free in-game currency or hacks, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9469

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/how-to-hack-minecraft-game-hack In PDF document text
    • http://krumerhaus.at/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-tiktok-likes-no-survey_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_off00002954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2954 22260 bytes
SHA-256: adf76f6c162567729a5c18069226c46a9c1318b778c9d6e1586fc3cd29c8dda1
font_01_sfnt_off00005aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA6 18044 bytes
SHA-256: ee12250b32ae9257b8264adf9c9bd9c6b89cbb94dc70a51b2b21ac09721525f2

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