Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1dc2a62f31b087…

MALICIOUS

PDF

30.7 KB Created: 2021-07-19 08:43:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d4f9d1d3f52528cb2cdec324fbc930d2 SHA-1: 47913e3160321fc9707dfd32cfbb80578a003ec6 SHA-256: 9f1dc2a62f31b08772c5915091fb05451f32f9b603e20a2681549c020a93946d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action button that direct the user to websites offering 'free Robux' or game hacks. These links ultimately lead to other PDF files hosted on suspicious domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the 'ML_NYX_PDF_MALICIOUS' heuristic firing indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9387

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 http://netcdn.tw/app/431946152/games-that-give-you-free-robux-game-hack PDF link annotation
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000020f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x20F9 22568 bytes
SHA-256: 2328f2e6f1721dd69eb370977e38f657b2960aacfe443901cb9c34e1ad57be2f
font_01_sfnt_off00005332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5332 19352 bytes
SHA-256: 28ad90d7edcf929d37a814a21d27f083841fc3a35400a1a93d6e572bead5d0d1

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