Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc59159def2e7b72…

MALICIOUS

PDF

46.3 KB Created: 2021-05-12 11:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f25e8559288a5646ca32f84aadef46ad SHA-1: d612ff92a4a2ec45d4c3c2d89c2c704956dc2501 SHA-256: dc59159def2e7b72083b0882577e35baa79d4fc02663566c636940bf2dfba51f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.8696

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/431946152/robux-no-human-verification-2021-game-hack PDF link annotation
    • https://www.kambati.co.za/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-to-get-free-robux-games_GM431946152.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_003_off000047f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F2 27276 bytes
SHA-256: 1f49a8dade87c4b586c410a8000c71d8752dd4005d7f7a0568674e5d278f20d2
font_01_sfnt_off000085d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D4 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off00008fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFF 19100 bytes
SHA-256: cb8809738aabb1441b1427e812c482b7c8f50740efdb0db68f9cd49fa431659e

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