Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc74564425d7e4b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 23:36:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bae69890a3d854d9f43bcd160bf34d9b SHA-1: cfab34e9b705859c8ebe6bebf07667b37422556d SHA-256: 8bc74564425d7e4b9bb3d2f7c4449bbf62be8b02ba2b5d866fa26e114c66e961
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 0.9980

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/406889139/coin-master-free-soins-game-hack PDF link annotation
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/vermillion-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/cheat-roblox-soros-resataurant_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-robux-hack-tool-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-support-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-hack-t0pk3k-40_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-games-stealing-free-models_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/survey-tool-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/bloxburg-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/bullet-club-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-backpacks-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-get-free-robux-the-real-way_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-project-pokemon-free-pokemon_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/free-robux-without-verify-2021-april_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/how-to-get-free-wings-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1lmg.my.id/__statics/gudangsoal/files/roblox-thomas-wooden-railway-free-demo_GM431946152.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
font_00_sfnt_off0000341c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x341C 22704 bytes
SHA-256: 3247e8e0bb6227bdea648249dc719f9cd30a0ad74c122b0a64f8b917aaae04ee
font_01_sfnt_off000066e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E8 17996 bytes
SHA-256: f4306de497449c0c0250de5deec7b8066a87c54091f9de3abe5accc399ec3ddb

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