Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41a863fbe291079…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 11:13:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5e99c9d50db413463a8bca9989937f37 SHA-1: 45fff30b7f1ad30f38b6a93001bc65b39cd973e1 SHA-256: c41a863fbe2910793f09f588361a7410390adbe3038a138eee883bbfcebb1a9c
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/free-spins-coin-master-links-blogger-game-hack PDF link annotation
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-get-free-roblox-codes-2021-may_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-get-no-head-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-robux-hack-org_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-make-free-models-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-hack-in-skywars-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/roblox-solo-hack-client_GM431946152.pdfIn PDF document text
    • https://elearning.maalhidayah.com/__statics/gudangsoal/files/how-to-hack-arsenal-roblox-mac_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
stream_002_off000033df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33DF 22780 bytes
SHA-256: 00d43829c508a77c51706d56f4014256f8d054adf48af5c67cb970cc01741162
font_01_sfnt_off000066b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 18632 bytes
SHA-256: 3bd5d70d92567c4e9fdab6ab0c4abb83fff73585d00d870a94bf54a7db3788b5

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