Malicious PDF — malware analysis report

Static analysis result for SHA-256 848d1f87aaa6a865…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 22:27:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e788cba563807fe25276370c5315f816 SHA-1: 0519a5f6e5b5d78ad1aba2c9bf9b6f0abf383056 SHA-256: 848d1f87aaa6a865402f46bd114b47a5c9352a09bd83c527531cfccbfb0795d6
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 0.9971

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/free-spins-coin-master-ios-2021-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off000048be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BE 24752 bytes
SHA-256: f596a2f5c2c59a02a9386754ac0ca7659a4e468a9a171ac3785d78b9006d77e3
font_01_sfnt_off000080eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EB 18288 bytes
SHA-256: 33dea10a5a633473ad7171de371eb5bee55008ca682d385727c80e9101e9f1e4

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