Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0653b7fd4447d4…

MALICIOUS

PDF

41.2 KB Created: 2021-04-28 03:39:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0738bc346b41f93b6bc16cb985df66b4 SHA-1: 81128a5e7f710c6c7ddfef60e8e4af9193798783 SHA-256: 3a0653b7fd4447d4280bf5c327b23ee7bc2cd7da8c96f293d55322b1be060feb
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 fake browser/software-install 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.xyz/app/431946152/free-roblox-virtual-codes-game-hack PDF link annotation
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-free-robux-no-tradeing-no-geting-band.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/robux-for-free-not-fake-by-scammer-kid.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/get-admin-in-any-roblox-game-hack.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-breaking-point-aimbot-hack.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-com-roblox.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/attack-on-legends-script-hack-roblox.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coalesce-roblox-hack.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/get-free-robloxgg.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/noob-brat-vs-pro-vs-hacker-vs-god-vs-roblox.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/hacked-hat-roblox-t-shirt.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_off00004266.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4266 26100 bytes
SHA-256: 7b75dc4ab969260f1b3baa71486725db768f87fa94c5bde5c0456822d381b614
font_01_sfnt_off00007d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6F 18848 bytes
SHA-256: 2c199f4cbef7f9819da56df53b7b6656867a293c62dba45ae566fe416f155dea

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