Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfed66ce356cf295…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 17:11:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0a189d74ae989c2f5940537cf41a8618 SHA-1: 264e3629a80b72ed19faad7ee3603219e7ebc4eb SHA-256: dfed66ce356cf29568fad20ddfd851050c9b1db71aa4b044a747ebce96d44df1
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/minecraft-net-download-free-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/hiw-ti-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-arcane-adventures-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-vehicle-simulator-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-speed-hack-on-roblox-no-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/best-free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-golden-wings_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/speed-hack-roblox-ccv3_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-ice-cream-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-account-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-tix-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-cape-catalog_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-15-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-jailbreak-mobile-cheat_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-giveaway-live-now_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-someone-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-lumber-tycoon-2-how-to-get-free-money_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_off000031eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EB 22176 bytes
SHA-256: d6cfb133dd559c909cde9abd9aa0dfb7069594db3a6a205912ff7b122efefedc
font_01_sfnt_off0000630a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 18576 bytes
SHA-256: 08aed254992f756bb4253ed6d1ced4f5fc057e628d202e4f570a02296df47b27

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