Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2c8dc737d0131d…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 00:35:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 99b7d97e665938a8a094638c26907af4 SHA-1: 5124169c04bdb29e4b485f34bdbae65464a525fb SHA-256: ce2c8dc737d0131dd1ed3756136114803adaefe4d9f2b4dbacec6b3dfb2f673a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux generator' which links to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-generator-club-game-hack PDF link annotation
    • https://cluster-consulting.com/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-outrageous-builders-club-roblox_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://cluster-consulting.com/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coun-master_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-links-free-spins_GM406889139.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_004_off00004fc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC1 26612 bytes
SHA-256: 17ea08925e008f4dead2f39a2528ef40a2eeed49e5f3af16c2d815a4e255231d
font_01_sfnt_off00008b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6C 18420 bytes
SHA-256: e48fdc130e0945f57b693037eebe2d3442d1cbcdee636641cb4e453de2e03858

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