Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6a03d36db3f648…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 01:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4105c2f8d56ea809af2de2fa797216c2 SHA-1: e99293f01fc8191865567851b090481d96a3e93c SHA-256: 5b6a03d36db3f648b531cd1d79591f5481669ce4f430c9bf164e9194ff3c44b5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a game hack lure, directing users to external URLs. The primary URL, https://netcdn.xyz/app/406889139/coin-master-exchange-40-free-spins-game-hack, is presented as a 'free generator / game hack'. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it's designed to trick users into visiting malicious sites, likely for further exploitation or phishing.

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 https://netcdn.xyz/app/406889139/coin-master-exchange-40-free-spins-game-hack PDF link annotation
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/master-game_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/roblox-comcom_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-hack-version_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_003_off00004e57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E57 24584 bytes
SHA-256: a7f5773ecd7969cc74075a102bae03b58f070319afca2e7db8c66cb57193ffc6
font_01_sfnt_off000086f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F7 19660 bytes
SHA-256: efb562abe2f11b88ac6e33ed0b006421d94701d275ef50575285768875bc6fda

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