Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a307024af984e90…

MALICIOUS

PDF

41.7 KB Created: 2021-04-23 14:47:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ace4f7ad63dab9b17aea438b475da263 SHA-1: 7736d3f7990278ebc846349615b13f4ecbb36424 SHA-256: 3a307024af984e90d6f253a1eb369a1dbabf82d2c5eb7736accb77aa75876857
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.top/app/431946152/how-to-get-a-free-2021-2021-roblox-account-game-hack PDF link annotation
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-make-tshirts-on-roblox-free.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-robux-for-free-in-jailbreak.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-ez-hacker.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/pastebin-roblox-free-robux-2021.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-hacking-lua-c-script-copy-and-paste.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/simple-hack-roblox.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/exploit-hack-bee-sworm-simulator-roblox.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-uno-scirpt-hack.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/roblox-hacked-download-free.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/roblox-cheats-keine-kontrolle.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_off000044a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44A5 25652 bytes
SHA-256: ad875bdc5f8ed6a565a2acaab996f469aedc716fac4c6fe3e5af5cb83f2add9c
font_01_sfnt_off00007f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F99 18756 bytes
SHA-256: e140c160b854e48c94d23fc2056235697a669b3d5080d4f483669855d1e6e67b

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