Malicious PDF — malware analysis report

Static analysis result for SHA-256 df53e38700c3382f…

MALICIOUS

PDF

32.3 KB Created: 2021-07-19 08:42:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9aa56d685bb6ac4facc86c51d75a57d3 SHA-1: 47d8c64f16f5baa0da040319a70007d03e4b5c51 SHA-256: df53e38700c3382fb236bfcd7fbe5012fd9e023014b30f3e8b98f87cdee5ed7e
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, specifically promoting 'free Robux generators' and 'game hacks'. The ML classifier also flagged the document as malicious. While no scripts were directly extracted, the embedded links and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9496

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/431946152/free-robux-generator-no-human-verification-game-hack In PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://www.alldaymedicines.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.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_off00002726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2726 22812 bytes
SHA-256: 6dac113e6e46f342410db2270c65005088b2810e7356e1dab305e636ffc0acfc
font_01_sfnt_off00005a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A83 19044 bytes
SHA-256: c31724584a441eb3e9b5c0cc4d94dd3ce248733649a885fcc2b9eb61348ba6fa

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