Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fea14ac4dba784…

MALICIOUS

PDF

33.9 KB Created: 2021-07-20 01:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc5df4dba4b8e45454d8ab373e3f5379 SHA-1: e553b47f63e3152d0cc9ed67c47d99aa9ba91f91 SHA-256: a9fea14ac4dba7844e77dcb7d7650de8fab125fa027a36090ec494ad48d93599
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious domains, masquerading as game hacks and free item generators. The heuristic firings indicate that these links are associated with malicious redirector infrastructure and a lure for game-related cheats. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/real-free-robux-codes-game-hack In PDF document text
    • http://verenacrow.at/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://verenacrow.at/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://verenacrow.at/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://verenacrow.at/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://verenacrow.at/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://verenacrow.at/images/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://verenacrow.at/images/how-to-get-free-robux-on-phone_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_off00002de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE3 22956 bytes
SHA-256: de5b208f8b0fff266280cc144d79451c53d8d9c0ca8e4fe6d25b195561bfadd7
font_01_sfnt_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 18676 bytes
SHA-256: d997f8dbe5fc9170266e0fe06da81ef1f9b40d7de8e1f17e13013b91ed06a44c

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