Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5da4c0dd40983b…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 07:14:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0187a873bd0902becc8c7f35aa3619a5 SHA-1: 6e975c5447cc6cedd5d32baf5f88a9bfe043f499 SHA-256: ac5da4c0dd40983ba270b286c0f1079fa051b2ccf313c66e335b5a9f2c367ab8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9797

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.online/app/479516143/minecraft-education-edition-free-game-hack PDF link annotation
    • https://www.itc-nekretnine.hr/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/moon-active-games_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/pokemon-go-free-3-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ec3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC3 24268 bytes
SHA-256: 0ffed44e82dbe632274f0e691a63e172f8506bc0e4a49c53d9a9fa5fadebbe8b
font_01_sfnt_off000085f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F6 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
font_02_sfnt_off00009036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9036 18024 bytes
SHA-256: 50b2d5ff22f0b3ffa840834f12cbec9953eabd3c4e347b5eb6eb3aff22325aed

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