Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91daa9cfa88d665…

MALICIOUS

PDF

41.5 KB Created: 2021-04-24 19:26:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7b808b294ab627d5286d94d4104f1c96 SHA-1: 2aa454a072d376b7f38bf2391d70ecd4b249aadf SHA-256: f91daa9cfa88d665a9a1f9b2df1d8776e8cd082de3260095271b1be9e33d28fd
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-robux-generator-cheat-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-cheats-prison-life.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-scibt-pack-exploit-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-to-get-robux-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-obby-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/promocodes-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-800-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/youtube-how-to-get-free-robux-on-computer.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-my-gamescom-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-big-paintball-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-be-all-black-in-roblox-free.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
stream_003_off00004334.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4334 26888 bytes
SHA-256: e88f79c987a9d047c0f5a2e0f3c010f95e700c32b80249df7a5cf5ee4cfe4313
font_01_sfnt_off00007ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 18512 bytes
SHA-256: 9d69a53bface53a8cb5873c9abdb588cfe3244316280caa9535d145d928f160c

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