Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1e7448b335b278…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 01:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2931c7a1e2742d735761efc2b3fa875a SHA-1: a13040a0a6d8005dc27720eb7ff578b3242eb6b4 SHA-256: fe1e7448b335b278001bd358f44eb9a14b4e9bfd9c7360a6aab433e9e85b3ee1
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 0.9971

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 https://netcdn.xyz/app/431946152/how-to-earn-robux-for-free-2021-game-hack PDF link annotation
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/minecraft_GM479516143.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/real-roblox_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3ENEW%20Counter%20Blox%20Hack%20Exploit%20Roblox%20Aimbot%20Aimlock,%20ESP,%20INF%20details:%20-%20Full%20feature%20list,%20extra%20tricks%20and%20user%20guide%20included%20in%20download%20file%20-%20Anti%20detection%20system%20-%20Proxy%20and%20VPN%20supported%20-%20This%20tool%20supports%20all%20Windows%20and%20MAC%20OS,%20latest%20iOS%20and%20Android%20platforms%20-%20Easy%20install%20and%20use.%3Cp%3E%3Cp%3ETag%20Archives%20:%20Counter%20Blox%20hacks.%20Counter%20Blox%20SERVER%20CRASHER%20%5BOPEN%20SOURCE%5D.%20Synapse%20is%20the%20#1%20exploit%20on%20the%20market%20for%20Roblox%20right%20now.%20It%20has%20tons%20of%20features%20&%20gets%20weekly%20updates.%20It%20only%20costs%2020$%20Paypal%20or%2015$%20crypto.%3Cp%3E%3Cp%3EC%C3%B3mo%20Usar%20Cheat%20Engine%2025%20Pasos%20Con%20Fotos%20Wikihow.%20Cheat%20Engine%2067%20Download.%20Videos%20Matching%20Hack%20Dragon%20Ball%20Rage%20Thegoga%20Revolvy.%20How%20To%20Download%20Roblox%20On%20Mac%20Roblox%20Free%20Skins.%20Roblox%20Hack%20Xuyen%20Tuong%20Roblox%20Generator%20Game.%3Cp%3E%3Cp%3Eare%20you%20allowed%20to%20hack%20roblox%3Cp%3E%3Cp%3E%3Cstrong%3EReferences:%3C/strong%3E%3C/p%3E%3Cp%3E%3Ca%20href=In 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
stream_003_off00004965.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4965 24876 bytes
SHA-256: df3a0653b195a94368389496c10e2d9d31381637532c4c7fd12395e10c56b466
font_01_sfnt_off000082eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EB 18204 bytes
SHA-256: c56b254c2b40f9e791f6e16a934b9251352e6334f5399c5e1cf61476904d0843

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