Malicious PDF — malware analysis report

Static analysis result for SHA-256 f189822c7d62f581…

MALICIOUS

PDF

43.8 KB Created: 2021-04-29 07:15:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 902f962f05d927ad872e2bd1619abda7 SHA-1: b11a932de7b845e5c998745d5ed622b2e1d3d7cc SHA-256: f189822c7d62f5812f1f79ab6a46926f7cabfd06be5012b21cfb5da4f8ddfe6a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a lure related to game hacks and redirects to external URLs. The document body, though heavily obfuscated, contains a URL that aligns with the 'game hack' lure. The presence of embedded URLs and the ML classifier strongly suggest malicious intent, likely to lead the user to a site that may host malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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/how-to-put-in-cheat-codes-roblox-game-hack PDF link annotation
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-free-tix-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-get-your-robux-back-without-hacking-or-buying.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-access-the-studio-of-a-roblox-game-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-oakley-roblox.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/shirt-roblox-2021-free-dowload-transparent.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-sword-fight-on-the-heights-original-how-to-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-x-ray-hack-autohotkey.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/op-free-robux.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-dbz-rage-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-hack-arsenal-roblox.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_003_off00004035.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4035 26340 bytes
SHA-256: 2dd0f3cb4c7dcf5b569e5f37e77a17adbd6d799e1a18db1dad0ec5b232a077e3
font_01_sfnt_off00007bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF1 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off00008740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8740 18912 bytes
SHA-256: 1a260cab44354383af5fdd0140b976f5cb095345b029470b2fca94687315a797

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