Malicious PDF — malware analysis report

Static analysis result for SHA-256 9656538d6de5fc81…

MALICIOUS

PDF

36.9 KB Created: 2021-05-22 21:38:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0513fcc64c0159d767490384410a71bd SHA-1: 1ac208a47f31f9e7b1917184dfbfb6cecbbe11f4 SHA-256: 9656538d6de5fc81e85fcd10cff0c70bfb7e22098203b05040f875c8a9ecf77f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-server-hosting-24-7-game-hack PDF link annotation
    • http://klinkeridee.de/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://klinkeridee.de/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://klinkeridee.de/images/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F49 23516 bytes
SHA-256: 02c6c8d3823acd27b7eedf3840773edc14564661412ee0dd90931faec861c1b5
font_01_sfnt_off00006470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6470 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00006e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E59 18352 bytes
SHA-256: 91a7490c887560cf1db9cb18ebb1e2a98db2d1ca6a1740dfb9f9cb38742cb9c1

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