Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd3b1e82330ed21…

MALICIOUS

PDF

36.8 KB Created: 2021-05-22 08:46:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 77060c5cf8efeaf7358263de545dfc29 SHA-1: 3765c1f0a465c2f40f784cf7fe34860407ed33da SHA-256: 3cd3b1e82330ed218c1bfd6f2b55d44e482f72ef1ed0ce68d124e1d6961b525a
160 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirectors, disguised as 'game hacks' or 'generators' to entice users. The ML classifier also flagged this PDF as malicious. The document body and heuristics indicate a lure for potentially unwanted content, likely leading to further malicious downloads or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-hack-peoples-roblox-accounts-game-hack In PDF document text
    • https://gryps.de/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/roblox-system_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E2 25996 bytes
SHA-256: 3e793ce0bb4f005f65172d040d0b06b980e0308009421480d03da2ec0ca88e4f
font_01_sfnt_off00006c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C66 18920 bytes
SHA-256: cd7407ef9aef6c4c50b1fdf01e763fd2e22944ade267215dee183f168e7b87f5

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