Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6b9621dbef9560…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 11:59:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: af93b3445ecab10824236e9933660a19 SHA-1: aba7e83bab0a1150c590db5c3c2fe2345acd0e42 SHA-256: ab6b9621dbef9560612778e05c0303c1542ca3b429da2a5fef716de6f98e4f8e
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/431946152/free-robux-hack-2021-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/instal-roblox-free-and-easy-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-a-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-prison-life-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-gamepass-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-project-jojo-free-items-exploit-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-for-kids-no-verification_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
font_00_sfnt_off000030b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B7 22488 bytes
SHA-256: 2540e8036196769977f82301511383faa754cac26fe1de1fe0f28f06f367cde3
font_01_sfnt_off000062c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 19288 bytes
SHA-256: f0e75447e64b5aff6e0a409bd439ae7070421d1013f4950abf0614a44f9f6dfe

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