Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fb430bf286c8fc…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 09:58:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3f2d2a74e899f1c88d733976542fbcde SHA-1: 88e474f4bff301fe5918ddca16234bfd441a1665 SHA-256: 97fb430bf286c8fc0ab3a242b4bf22757142fa0bf0048c63a1d96fb1122e0093
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it's a lure for a 'free generator / game hack'. It embeds a URL that redirects to known malicious infrastructure, designed to trick users into clicking. The document body and embedded artifacts are heavily obfuscated, but the primary intent appears to be redirecting users to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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/479516143/free-minecraft-bedrock-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_off00002d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D65 24696 bytes
SHA-256: 826fa6aa35ee728b44748a74351441994762aaba11c7699cc922bf1019acf94d
font_01_sfnt_off00006636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00006fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDD 18268 bytes
SHA-256: d34bffa2112548f8729f10b9022dbaea9618b038b2dadf4195d892bf0ac95b27

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