Malicious PDF — malware analysis report

Static analysis result for SHA-256 0175154f36f7988b…

MALICIOUS

PDF

40.6 KB Created: 2021-04-27 07:21:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3f8f3ad388adbfb5fe2a7dddae5e040b SHA-1: 20efece7fafa636b8c556c25bddb58bca09c7116 SHA-256: 0175154f36f7988bc56a2a37703bf4ecf62e94c18e248ded544fdf168e646d20
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/free-roblox-advertisement-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/stella-roblox-hack-buy.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-edit-roblox-hacks.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-make-a-group-on-roblox-for-free-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/codes-to-get-free-robux-may.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/websites-that-get-you-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-notifler-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-cheat-codes-from-nitro-fun.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-your-old-account-back-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-xbox-gameachivements-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-sql-injection-free-robux.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_off00003fa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FA7 26172 bytes
SHA-256: d21437c05765a5246999e77fe6d9e49b58159d472f1072e108a38176e47100fd
font_01_sfnt_off00007bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 18720 bytes
SHA-256: 0997f51d6c7c794842f13df5c9ac968cc09f2d75ffefcbd0d108318154bbd10f

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