Malicious PDF — malware analysis report

Static analysis result for SHA-256 15915b7b964697cc…

MALICIOUS

PDF

42.8 KB Created: 2021-06-14 01:30:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7fe2f70cac4bb6b09dd41d22e12b4aa2 SHA-1: 1823cd807909dfb255f8932925b3527b130df421 SHA-256: 15915b7b964697cc845d686d190aeae22f13ab3bd43182e7813458631c821e25
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 http://netcdn.co/app/431946152/roblox-tix-factory-tycoon-packet-tix-hack-game-hack PDF link annotation
    • https://www.cow-style.com.tw/upload/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-inferno-box-in-miners-heaven-roblox_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-spin-link-for-coin-master_GM406889139.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_off000048db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48DB 25652 bytes
SHA-256: a672551851b44860acd9567224539da03d510b553386d21181d1e830185f2c6d
font_01_sfnt_off00008303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 18904 bytes
SHA-256: 0c805fa1faf8378450e14aa24a1d7c9fa32f2815cc3b8f76e03c68c696a01877

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