Malicious PDF — malware analysis report

Static analysis result for SHA-256 0adb625174de4648…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 14:21:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5c221531d5240c90d6ededa0c9fb6d15 SHA-1: 932e3be53362e2a31a31eedd32f8714abd9ed87a SHA-256: 0adb625174de464886cdcb591e183836dc730b7035f13133981d416948776b9a
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link disguised as a 'free generator / game hack' lure, directing users to the URL http://netcdn.tw/app/406889139/free-coin-master-spins-blog-game-hack. This heuristic, combined with ML classification, strongly suggests a phishing or scamming attempt designed to redirect users to potentially malicious content. No scripts were extracted, limiting further analysis of the payload.

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/406889139/free-coin-master-spins-blog-game-hack PDF link annotation
    • https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/roblox-phantom-forces-uncopylocked-how-to-make-all-guns-free_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/roblox-hack-get-infinate-money-on-bloxburg_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/roblox-how-to-free-robux-for-free-with-out-hacking_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/pastebin-free-robux-no-waiting_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-one-app-rewards_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/are-free-roblox-exploit-safe_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-no-offewrs_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-roblox-accounts-with-bloz_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/hacks-roblox-cambiar-nombre_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000334a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334A 23032 bytes
SHA-256: f357798e11493ac9a2106e12d0aa12ba2c946392a17722c8e4d57c329ccddcfc
font_01_sfnt_off000066fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 18464 bytes
SHA-256: 4bcaff5a2789d7186c9fa4ee96d365b8eba602a20bbe86fe3da838c25a781984

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