Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff7f01879a1c0c9…

MALICIOUS

PDF

37.3 KB Created: 2021-05-12 14:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b6ed52736648b6d803a7d71f99e33425 SHA-1: 176ea88d2c871e7dd99023d5842b718d0f2b08bd SHA-256: fff7f01879a1c0c9731ddd96870ec4c8b123dd133826b5c3077ef0704eb44947
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'game hack' to entice users. The embedded URL, https://netcdn.xyz/app/479516143/how-to-get-minecraft-bedrock-for-free-with-java-game-hack, is the primary indicator of this malicious redirection. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-get-minecraft-bedrock-for-free-with-java-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_off00003471.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3471 26184 bytes
SHA-256: 12cfcc7ea2719106b231e9b2a4479f7b68787baa81cab02615524796da7b3701
font_01_sfnt_off00006e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E12 19080 bytes
SHA-256: 002987b75c35d71c6d5d20848391c929676045185f0534b5c79dddd252281abc

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