Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ef0daefb328740…

MALICIOUS

PDF

38.6 KB Created: 2021-05-25 07:03:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6340fa93b166514def92faf235682a72 SHA-1: 0fc4eafd09f114a2d5037c7ab2750776ba3c568c SHA-256: 23ef0daefb32874000613d53222925d3c33d14f9f54a09fe3d0ea460fd21588c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, masquerading as game hacks or generators. The document body explicitly contains calls to action like 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' and embedded URLs that lead to potentially malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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-mobile-free-game-hack In PDF document text
    • http://rivas-treuhand.ch/images/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://rivas-treuhand.ch/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://rivas-treuhand.ch/images/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://rivas-treuhand.ch/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://rivas-treuhand.ch/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn 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_off00003415.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3415 29568 bytes
SHA-256: b87dfee122ca4b3ebef1565b171ff4b84357597c50422b0d889fda6fdee34e98
font_01_sfnt_off000076e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E9 17944 bytes
SHA-256: ce10a2b2c496b69fcf76f31cd4916c063e1dd9befde4055646c3ea28f41e8e8e

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