Malicious PDF — malware analysis report

Static analysis result for SHA-256 a587048e3b0d4dff…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 08:49:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ed2f893b1db3d0fb0e69326a80a161e SHA-1: dc0e303abbf1fd3b972cc3651574b8f22f80b07e SHA-256: a587048e3b0d4dff84d2d82bc225feecda8bba711cc6d164acbc857cab162162
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.co/app/431946152/free-robux-hack-reviews-game-hack PDF link annotation
    • http://digilibfisip.uwks.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/reddit-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-generator-links_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/get-free-robux-ad_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/android-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-inquiditormaster_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/can-you-get-free-robux-from-creating-a-game_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/guess-the-song-roblox-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-got-free-item-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-roblox-accounts-with-edit-this-cookie-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-skittles-tshirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off000030e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E6 22720 bytes
SHA-256: 3419bbed6f07126a56f407ffa3464cec31bdd64177d604c98f1462caf43b3bf8
font_01_sfnt_off000063be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BE 19284 bytes
SHA-256: 41daa0b02ca80b27455e5d5378efd74c22d93d9f7415da6873e24795869f16fa

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