Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6b13b8edfc85cb…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 16:14:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 566b24f508eed103283c0ab34d1e3aa5 SHA-1: f1d5b428eefeeeb12b274c0b876866763d12bae7 SHA-256: eb6b13b8edfc85cb9dcd4775fa4e46fb9306dd3dc0daf7336be362dfafca9f88
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/cute-free-roblox-outfits-game-hack PDF link annotation
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/video-hacker-roblox-francais_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/exe-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/pokemon-go-free-team-change_GM1094591345.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-list-2021_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/how-to-get-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/roblox-skywars-hack-download_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-premote-group-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/speed-hack-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/coin-master-hack-facebook_GM406889139.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_off00003449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3449 22244 bytes
SHA-256: 6741687910ce6868c73f72b569cef1e44fc6bd15a9f515257d41070036b0224c
font_01_sfnt_off000065e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E3 19012 bytes
SHA-256: 95d501f7148a0fa1d68d5ad1c68c7fffa2b97c0fe2e32f082608f9966088e773