Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53dffdeda2cb385…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 16:46:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ce77147e6fb7055b0bfac1d518601bb5 SHA-1: 31f6dab89fe4cdb40eb8d21ca2524ea4808919d4 SHA-256: f53dffdeda2cb3855b86241570bd50497385e55b6ac910499e5f6353a1209a0c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of free game hacks and currency to trick users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/site-robux-free-game-hack, is identified as a high-risk redirector. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest it's designed to lead the user to a site that will likely attempt to download further malware or conduct phishing. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/site-robux-free-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/robux-robuxian-awesome-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/secrect-free-rooms-in-roblox-high-school_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/infinite-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/fre-robuxe_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/pastebin-2021-robux-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-accounts-2021-august_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/can-you-cheat-in-roblox-flee-the-facility_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-file_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/v3rmillion-roblox-free-nuke_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-free-robux-game_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-catalog-script_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-windows-10-edition-unpatched-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-para-roblox-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-minecraft-addons_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_off00002e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E04 22576 bytes
SHA-256: 92966a55f35b74d67b32bbd99be91d7b48f951efa836372c256c94b475ea79ba
font_01_sfnt_off0000605a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 18940 bytes
SHA-256: df532492c91d2decbc4391d64fa571056b6ba20dd49219b97da0e2863fc85966

Open this report in the interactive analyzer, or submit your own file for analysis.