Malicious PDF — malware analysis report

Static analysis result for SHA-256 478cf21af378253d…

MALICIOUS

PDF

40.2 KB Created: 2021-05-24 00:28:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0b222480f252f63f5e16b10be02d3912 SHA-1: d24fa863ac5e9fe0ec19ef76aaa9df0a43e02f75 SHA-256: 478cf21af378253dac0a9b623b5673f816694f33540217e01d57d68bbdd43345
160 Risk Score

Malware Insights

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

The PDF contains a lure for a "free generator / game hack" which links to known malicious redirector infrastructure. The document body and heuristics indicate a redirection to a URL designed to trick users into downloading or accessing further malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8010

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 https://netcdn.xyz/app/431946152/earn-free-robux-for-roblox-game-hack In PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35EA 26072 bytes
SHA-256: 79e521032bd57050c5cee2ded9af9262dab23677806b2afaec61f900b10b41d9
font_01_sfnt_off00007180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6B 18316 bytes
SHA-256: 81577c12f28394e63c3fe269139937f952c5f2f271c4ac7315843a65914bc4b9

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