Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac240e4ad50cce8…

MALICIOUS

PDF

39.7 KB Created: 2021-04-30 05:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 71a785c16bcf6043d55c483f5d001d0b SHA-1: c05e0493840c7709ab55a644ec57fd9bf03068ec SHA-256: bac240e4ad50cce8b818a02a120b425754346524dbe98232c4375cb66b094411
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/code-for-free-robux-2021-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-prison-life-wall-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cheat-sa-roblox-rs.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/when-does-roblox-heroes-online-go-free-release.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/getbucks-me-roblox-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-you-hack-robux-using-promo-code-inspect-element.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-money-on-roblox-ultimate-drivin.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/vortexx-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/baldisbasicsbetafreeitemsonmap-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-assasssain-in-roblox-youtube.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_off00003f2d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F2D 25056 bytes
SHA-256: 044717a544b5465a7982eb7e62ac7374a14e345a1a63f3affa9c1d09266a88aa
font_01_sfnt_off00007832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7832 18588 bytes
SHA-256: 07a600850443eb54a256d33d5c59d4b3849ba72cb560a4985c23ea7a87e96662

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