Malicious PDF — malware analysis report

Static analysis result for SHA-256 44aa79074fd66e14…

MALICIOUS

PDF

44.1 KB Created: 2021-05-10 12:07:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 94551836461d3b8e401ee3c10be11bfd SHA-1: cb126086553acf6cfd1fbd2092750d9bac0744f2 SHA-256: 44aa79074fd66e1491452158f7e9ac881e536f0539b4e5856fcd353c2c139f75
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for linking to a malicious redirector, specifically advertising a 'free generator / game hack' for Minecraft. The embedded URL, https://netcdn.xyz/app/479516143/how-to-download-minecraft-for-free-on-mac-game-hack, is the primary indicator of this malicious workflow. Although no scripts were explicitly extracted, the nature of the lure and the redirector suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier clean score 0.0119

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-download-minecraft-for-free-on-mac-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000036e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36E2 28468 bytes
SHA-256: 0973ffc2d54f9f541ffe12e64608bbf3b8f7edf5cc6c81fad615714e1d9638d2
font_01_sfnt_off0000768c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768C 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off000080e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E0 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00008af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF0 18292 bytes
SHA-256: 5130427873d9275259bc23122af53847ba8d90dc149b772f5578788f281f3faa

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