Malicious PDF — malware analysis report

Static analysis result for SHA-256 9810f686126afe11…

MALICIOUS

PDF

34.7 KB Created: 2021-05-20 22:42:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a3c99c64f6e675a48728dbca1f5239eb SHA-1: 380fb2162edd54f52f40c25b802ac6c5ec9cf4bd SHA-256: 9810f686126afe11ebda7e7580a21c59b6bd0704fbe6c746db7245f9de14b515
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for 'Free Minecraft Texture Packs' and 'game hack' generators, which is a common social engineering tactic. It embeds a link to a known malicious redirector infrastructure, https://netcdn.xyz/app/479516143/free-minecraft-texture-packs-game-hack, designed to lead users to potentially harmful content or malware. The document body and embedded artifacts suggest a workflow intended to exploit user interest in gaming to facilitate a malicious redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-texture-packs-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_002_off00002cdb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CDB 25396 bytes
SHA-256: 8325713cd1aa93255db49f3946a9cb2cdd60e90dcbaf6d6892a3d5e7c37bf576
font_01_sfnt_off000066c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C1 18240 bytes
SHA-256: f1e7a9ae3acfaa3d56f6a9afcdcc307065316a5e3d8814942fd3993c062bfaf5

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