Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd8bed5daa80b40…

MALICIOUS

PDF

45.0 KB Created: 2021-05-19 01:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ecc5a79ed3a746e68092b0f60ea31b43 SHA-1: 1bb3d920001f7ee61509fb849f392771a2f7c97b SHA-256: 4bd8bed5daa80b4096843c963ee7763b881de411d4581889624624edce9f8ce7
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 0.9632

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/406889139/coin-blogspot-game-hack PDF link annotation
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/grab-points-login_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/10-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/coin-master-free-coins-twitter_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
font_00_sfnt_off00004bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBE 24688 bytes
SHA-256: 0ba777eb5f856b76a64bd7b6ce6f2bcf0f73be3c6d70142534c8800b34a82f97
font_01_sfnt_off00008455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8455 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E06 18072 bytes
SHA-256: b6b57aabf28892bff8d47b2ee948f48531a19b452856f7a7ef30095015ce7f2d

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