Malicious PDF — malware analysis report

Static analysis result for SHA-256 508bcc192ed425a6…

MALICIOUS

PDF

39.0 KB Created: 2021-05-19 15:36:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 595039b031a0befdb06aba9cafcf1c66 SHA-1: 91b490176bb92424ad05236d70c2d11f9d534384 SHA-256: 508bcc192ed425a60e2f05eee4448a1cbed5c9e317438ceb3bb3dc6f1de8e9a6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. The document body text and embedded URL reinforce this, indicating a phishing attempt to trick users into visiting the malicious URL. No scripts were extracted, but the primary attack vector appears to be a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/free-robux-picture-game-hack In 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
font_00_sfnt_off000032d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D4 23924 bytes
SHA-256: 64a57a077fc7957e6649a18d462388a402211c2c65e22e8729a6471d889cf88c
font_01_sfnt_off00006941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6941 4004 bytes
SHA-256: 59136f2f8a7ec806f2ad2914338c19c773a0dde5ddce15b7c6a2582fa0540917
font_02_sfnt_off00007671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7671 18392 bytes
SHA-256: 34b0e3a58c66b2af54b16d5c8d734c4555ce81663a4a6734022a64244545498a

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