Malicious PDF — malware analysis report

Static analysis result for SHA-256 562d277090cbcaed…

MALICIOUS

PDF

36.7 KB Created: 2021-05-10 12:04:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: df263cec363b00f1010e86d5585750bc SHA-1: 6ed7e972476f4a17a450718362975975ed3bb05c SHA-256: 562d277090cbcaed2110d10d24029fab6c9cc2dac979f2992067d40716f473cf
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically targeting users with a 'free generator / game hack' lure. The embedded URL leads to known malicious infrastructure, suggesting an attempt to redirect users to a phishing or malware distribution site. While no scripts were extracted, the document's structure and embedded URL strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/minecraft-beta-free-game-hack In 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_off000034ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34CA 25924 bytes
SHA-256: de682c5e63a019e9d9d9ba7f1566a9de857147c730b4136cf8055b6464871cda
font_01_sfnt_off00006faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 17784 bytes
SHA-256: ffa4e944bc3952cb658e805fb11da1f643d70f63a75572cc293d8aa9f3ac184d

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