Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6b63ac21ff16ac…

MALICIOUS

PDF

42.2 KB Created: 2021-04-27 00:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bb2ddc5f69df431b6972a8317ec56316 SHA-1: f5ced9d570dcd1480480a483754eb5f0b40fcec5 SHA-256: ac6b63ac21ff16ac6e76d5112dd28693bb1d604568c2b6a812da5eb57f335119
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and a call-to-action button that direct users to websites promising free game currency or hacks, specifically for Roblox. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a game hack lure heuristic confirms the document's intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links suggest it functions as a lure for phishing or malware distribution.

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/cpying-roblox-games-for-free-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/how-to-get-millions-of-robux-for-free.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/t-shirt-hacker-roblox.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-hacked-blocks-in-roblox-build-anything.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-money-in-roblox-games.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-northern-frontier-anti-cheat-bypass.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/v3rmillion-roblox-free-bots.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-a-rank-on-roblox-groups.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/robux-hack-no-survey-2021.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/conf-free-robux.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-welcome-to-bloxburg-free-play.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_off0000428d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x428D 26956 bytes
SHA-256: 94d53697d027f97091a2980c37ba80312f0b6ca5b639bfd45ce6b47db6faa2c0
font_01_sfnt_off000080bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BF 19200 bytes
SHA-256: 69ce2997ae255be0120873330444ef57611ed65eb790bb3fdc02a785f7e341e2

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