Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9cca84f2940398…

MALICIOUS

PDF

53.8 KB Created: 2021-06-11 04:20:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 22c55b333f35ae3e4a6c564675984ce6 SHA-1: 208ed63d2bc3956f954fcea35dafeb5483b0426c SHA-256: ad9cca84f2940398126c6d59c831b502869aa3e200af4b995ac5f0bd6a78dbfc
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 0.9636

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/premium-softwares-com-roblox-hack-game-hack PDF link annotation
    • http://linens.kiev.ua/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/ships-free-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-gray-pants-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/cupcake-hack-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/2021-best-roblox-hack_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-hack-a-roblox-game-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-70-spin-link-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_004_off0000509c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509C 36404 bytes
SHA-256: 772a87751e89154a94db5bd3397f950e4166a3a9c4a90dadfcfb8e3fb4811e0b
font_01_sfnt_off0000a0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F7 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000ad9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9E 19124 bytes
SHA-256: 4981f0629ae7cca226a61b53427980dde79816b6d784e8302f9a749d6e76b1e3