Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b79ae4cd19b306b…

MALICIOUS

PDF

46.1 KB Created: 2021-05-14 21:39:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31079443f05a549811a705abbf98727c SHA-1: 15f5f5578cabe4124135363e35e07b623e1b6f2d SHA-256: 8b79ae4cd19b306b3e68e27fc7066e7b07c13663cde2086f2937ac5da786982a
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 0.9432

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-november-2021-game-hack PDF link annotation
    • http://mycounty.com.ua/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/what-is-robux_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/hack-coin-master-2021_GM406889139.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_off000049ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BA 24748 bytes
SHA-256: 2fe94a88e0e0d48b8090d69c0d7378f9ee0de33f10f62ee98a683857a1a85242
font_01_sfnt_off0000827e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827E 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00009005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9005 18820 bytes
SHA-256: 51030d0b126b89f1cc2c8ab05e6528d79dc2725cd6845144c535f360e3c6c899