Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6a6d686b85b4ca…

MALICIOUS

PDF

46.1 KB Created: 2021-06-11 05:59:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a97bee46ffef82033bef3f50c6ab9314 SHA-1: 8cf47e4ca5a2c11441290ce565e563e8e788dfaa SHA-256: da6a6d686b85b4cafbf5794e7de29d82e759468657e7302a537d2a87cc188420
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and game hacks to entice users to click on embedded links. The primary link, 'https://netcdn.tw/app/431946152/legit-free-robux-2021-game-hack', likely leads to a malicious website designed for further exploitation or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/legit-free-robux-2021-game-hack PDF link annotation
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/rbx-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/my-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/pubg-uc-2021-free_GM1330123889.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn2kotabandung.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-apk_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_004_off00005584.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5584 24976 bytes
SHA-256: c1e824d5d36dc88e12c079d96150daad3466ce2a20edb8ae753a32345da14f33
font_01_sfnt_off00008f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6E 18928 bytes
SHA-256: 45deb5775b53bdaa4bd5ea06997ae27f1a2e238b87e6ca98e9714b83b2155d31

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