Malicious PDF — malware analysis report

Static analysis result for SHA-256 49de9d3be85f5b39…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 06:56:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 81a81cd02b1f0987b16562f8d86e93b3 SHA-1: 660b30b2b18afdc08f3e6839fea04d047b2fd921 SHA-256: 49de9d3be85f5b393c99e6dbb8b8a89798878594e88631bb194d142a5f048ed8
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-hack-a-minecraft-account-game-hack PDF link annotation
    • http://itc-nekretnine.hr/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/its-free-roblox-meme_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/glitch-that-gets-u-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/robux-hack-without-downloading-stuff_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/vehicle-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/clothes-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/topkek-roblox-hack_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/can-i-get-minecraft-windows-10-for-free_GM479516143.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_off00003124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3124 22360 bytes
SHA-256: 555278931d6739770ad551f28a0ddd45a926344306cc965b7bdc7eee3d8b5640
font_01_sfnt_off00006266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 18472 bytes
SHA-256: 824600d2932c5c84903576eb940eb4cbd4cde084a85eee387078d4913c62172b

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