Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d8b3dbd37c5d8a…

MALICIOUS

PDF

39.1 KB Created: 2021-04-29 03:53:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ab7a869c8735b0b0832429afc73a313a SHA-1: 73679312728b296b65a91b875f82cfd6e0222205 SHA-256: 66d8b3dbd37c5d8adc4b24532974f574306b336895c3a1907988320bd07f8ef3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one identified as malicious infrastructure. The document body and heuristic firings indicate a lure for a 'game hack' or 'free generator', which is a common social engineering tactic to trick users into clicking malicious links. The embedded links likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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/roblox-fly-hack-2021-game-hack In PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/free-robux-roblox-codes-2021.pdfIn PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/how-to-hack-robux-with-robux-generator.pdfIn PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/hack-de-atravesar-paredes-roblox.pdfIn PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/how-to-get-legit-robux-for-free.pdfIn PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/free-roblox-catalog-stuff.pdfIn PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/free-robux-discord-bot.pdfIn PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/how-to-use-synapes-roblox-hack.pdfIn PDF document text
    • http://modernzaf.com/uploaded_files/userfiles/files/hack-vehicle-simulator-roblox-2021.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
stream_003_off00003cb8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CB8 24400 bytes
SHA-256: 8bb9ebbfccb39a9d5d0c877dc0899575257316d62deefc6cb8e25eb6f1aad236
font_01_sfnt_off00007514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 18928 bytes
SHA-256: ac0b32f2b11b1779834555ac09ea470062c0c626593a2924d7b5a46c1fabc6de

Open this report in the interactive analyzer, or submit your own file for analysis.