Malicious PDF — malware analysis report

Static analysis result for SHA-256 b771f3f7c814f225…

MALICIOUS

PDF

41.8 KB Created: 2021-05-01 04:34:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c1c8d935c5be3465d57f4d90a485ee58 SHA-1: f0dd0068a9e852611538644cb1dac23a9c2a3244 SHA-256: b771f3f7c814f225e8eb866b89cc1aa112c1e78d1eb6d9a6b90eee6be9bb4911
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://netcdn.xyz/app/431946152/legit-free-robux-generator-game-hack PDF link annotation
    • https://ibelive.tw/image/data/files/is-hacking-robux-impossible.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/como-hackear-electric-state-rp-roblox.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-robux-no-email-no-password.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/cbro-hacks-roblox-2021.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/free-roblox-boy-hosting-2-7.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/exploit-hack-roblox-synpase-free-download.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/how-to-make-a-dominus-in-roblox-for-free.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/best-tycoon-for-roblox-for-free.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/roblox-skyscraper-tycoon-cheats.pdfIn PDF document text
    • https://ibelive.tw/image/data/files/claim-gg-free-robux-app.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_off0000436d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x436D 27388 bytes
SHA-256: 9175042f9177e493f8be48019b4958f35671df0093807a86515776f223f4855b
font_01_sfnt_off00008048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8048 18752 bytes
SHA-256: f0956b49c66c65c30ad0d138a9c56527dd6b81031afc0c248629050c333c7fa7

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