Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3663866d51bea3…

MALICIOUS

PDF

41.2 KB Created: 2021-04-26 03:36:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fabfb7dc885974c511e6994e6812652d SHA-1: 1177f251b65d23ae291d11d26ec6ebcbecb5f61f SHA-256: 5e3663866d51bea3e42129748563364036a30c01d1127b6cd5c726f26617ee8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The embedded URL, https://netcdn.xyz/app/431946152/roblox-free-admin-house-game-hack, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to Roblox and game hacks, reinforcing the lure. The presence of multiple PDF-related heuristics and the ML classifier output further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-free-admin-house-game-hack In PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-free-robux-download-pc.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-the-golden-tuxedo-for-free-roblox.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-10k-robux.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-account-with-robux-free.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-pastebin-may.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-creator.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/adopt-me-roblox-getting-hacked.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/phantom-forces-roblox-cheat-codes.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/cheat-engine-dragon-ball-z-final-stand-roblox.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-shenanigans-mod-cheat-codes.pdfIn PDF document text
    • https://robux-rank.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000042fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42FE 26496 bytes
SHA-256: c173565685770bed7abb84252eddfd41073ad1d0f564a1ea1b303fa03b94714b
font_01_sfnt_off00007e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E71 18640 bytes
SHA-256: dc0b9796a01854ca78dbdaad2470b9604f31da69b870f4a5a323b92c882ab8f1

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