Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a636f8b9346144…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 07:18:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3d8a8093980174a2a5b494fca0358967 SHA-1: d14c367204308bc55d4bf7a1dfe2229b7cde0fad SHA-256: 76a636f8b934614418ca5ff107bc2a5e83efcec99f90ed8676e79b93702a1997
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, including one specifically identified as a 'free generator / game hack' lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it being used to redirect users to malicious sites. The document body and heuristics suggest a social engineering tactic to trick users into clicking links that likely lead to malware downloads or phishing pages.

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-building-hacks-game-hack PDF link annotation
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-birthday-card_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/best-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-rs-500-roblox_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hack-siteleri_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-lumber-tycoon-2-hacks_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hacks-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-tto-get-free-robux_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/youtube-free-robux-hack-2021-hurry-before-roblox-patches-it_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/real-minecraft-for-free_GM479516143.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_off000032b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B6 21920 bytes
SHA-256: 253235ef5416479c5954dca6896dbd5e0993bcb354877c16c030edada4f085ca
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 18628 bytes
SHA-256: 03be4b6b10a4c687c6c89c16a3bf013511456428a76c01e3ee63370f4522cf94

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