Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fd984130539e63…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 12:21:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9fd5209ba7f15cd6b0a2e4583d56a223 SHA-1: 5c5102828717e4de567a15df5a770285801247fc SHA-256: 76fd984130539e636b5d1086f0586633a9c7d8928e1b9f0bdc10cadfdbdff5dc
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/431946152/free-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-roblox-so-i-can-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-hat-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-roblox-2021-savanna-wild_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-freehackshop_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-tool-pc_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/containment-breach-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-items-generator_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-u-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/wwwfree-robux-todaycom_GM431946152.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_off000030b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B6 22172 bytes
SHA-256: fb1a5d0ee9d137e64ad2f023e39748cba04ff51226ea003e417af0eec5b9127f
font_01_sfnt_off000061a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 20124 bytes
SHA-256: e8dc8af608a2467c92ba912a1f660b74916591188ffd601a7d8b89018af53e3a

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