Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94326991104f160…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 06:00:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6cc0e04bbb8fdbe7ff8c10a9e270860c SHA-1: 401013cdc52b419765439e520e52e70bfd16f468 SHA-256: d94326991104f1604e1fa945332197d603b8f9a868d28950451e05a7ae599b75
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 0.9972

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-robux-stream-game-hack PDF link annotation
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://msbrijuniversity.ac.in/ckfinder/userfiles/files/10-robux_GM431946152.pdfIn 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
font_00_sfnt_off000048fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48FE 24704 bytes
SHA-256: bd33bff59bdfb13f7a80b81a5e2b7041beb8f3bd1ee6b6f9ce71819ebeb1dbb5
font_01_sfnt_off00008139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8139 18608 bytes
SHA-256: d58c1050c241e8596ad00b07d95ef71c6ad75f8aac12cbee34afc6366c1e008e

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