Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d3a81f8bd44004…

MALICIOUS

PDF

47.0 KB Created: 2021-05-18 04:31:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e5c7d3571a46877033f6c116fdac3730 SHA-1: 661b8e566808d2a117b118d3cd1cc2e1ce967128 SHA-256: a2d3a81f8bd44004c51ea341afa9a55167cae3c7fc69944094f893d55453b652
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 0.8948

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/hack-coin-master-iphone-game-hack PDF link annotation
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/spin-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • https://learning.man6-jkt.sch.id/__statics/gudangsoal/files/how-to-use-scripts-in-roblox-hack_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_off00004caa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAA 24268 bytes
SHA-256: 970a133857b25066133918f278453838de39a5e8e036b6b6ab891dd721a4baed
font_01_sfnt_off000083fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FD 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9615 18060 bytes
SHA-256: 98ffcaa8ac03649816b9da258085ae9fc6eae62b2f5ad3ff33c1336735992c31

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