Malicious PDF — malware analysis report

Static analysis result for SHA-256 431c2d0814ec36f0…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 15:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 71e6a6236bb89436c15f9c0e8f4fec61 SHA-1: ab52f335627146678b7952f440131c38d7852377 SHA-256: 431c2d0814ec36f01f229376695e058fb67896c8fde5647f31a09e88f81ce946
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 0.9980

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 http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-computer-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/install-roblox-free-latest-version_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-nerd-glasses-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-jailbreak-hack-application-easy_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-spiderman-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/wls3-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-robux-for-free-2021-pc_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-acces-code_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-roblox-hack-tools_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hack-tool-site_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/gget-free-robuxcom_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/game-hunters-coin-master_GM406889139.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
font_00_sfnt_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22428 bytes
SHA-256: 44d9b1a73d29fe3885fc0419ad3f1c2e2832c11069be9ffa9dfc25f1da2f0d52
font_01_sfnt_off000063aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AA 18736 bytes
SHA-256: 17f0bfc7da489febe2cf31a01e732b59c776963868fc2712bfb7438877b5a354

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