Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a473201f752f1b…

MALICIOUS

PDF

41.9 KB Created: 2021-04-22 22:43:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c46cc74625143efa6ec6ea6315c847b8 SHA-1: 2379ae97e8b68eb01034a74ce5499dc5d7b45c89 SHA-256: b2a473201f752f1babad41bdb286e9600f69b56536988c1737e19c3645e0ee47
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 0.9941

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://netsecure.pro/app/431946152/how-to-get-free-robux-with-inspect-element-2021-game-hack PDF link annotation
    • https://fotoclub3b.it/images/free-gift-card-numbers-roblox.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-robux-credit-card-number.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-robux-generator-without-downloading-apps.pdfIn PDF document text
    • https://fotoclub3b.it/images/funny-roblox-avatar-ideas-free.pdfIn PDF document text
    • https://fotoclub3b.it/images/hack-into-roblox-accounts.pdfIn PDF document text
    • https://fotoclub3b.it/images/how-to-get-free-robux-in-roblox-easy-2021.pdfIn PDF document text
    • https://fotoclub3b.it/images/best-free-roblox-jailbreak-hack.pdfIn PDF document text
    • https://fotoclub3b.it/images/roblox-noclip-hack-mac.pdfIn PDF document text
    • https://fotoclub3b.it/images/hot-to-get-money-in-roblox-for-free.pdfIn PDF document text
    • https://fotoclub3b.it/images/roblox-hack-bars.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_003_off0000435d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x435D 26444 bytes
SHA-256: e7df6499cce77342c41c6853ff63c03546342a883fca3465f461a696a01a8f29
font_01_sfnt_off00007e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E17 19680 bytes
SHA-256: bc2dbac8efc5a8514fea072338410436de761ad3c4e2df826870a62178a4430d

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