Malicious PDF — malware analysis report

Static analysis result for SHA-256 42eb0ed251cd664d…

MALICIOUS

PDF

46.0 KB Created: 2021-06-11 10:24:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7a6fe428e24a61fb280f313e6134c858 SHA-1: 3000cbf6ccd96bd8c5100a675b65b2b39a3dcefd SHA-256: 42eb0ed251cd664d94dcb1e58c4cde4e4a54b9d96d551fcb011703b6465355e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for 'free characters roblox game hack'. The document body, though heavily obfuscated, contains the same URL. This indicates a phishing attempt designed to trick users into visiting malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/free-characters-roblox-game-hack In PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/tiktok-free-download-for-iphone_GM835599320.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/infinite-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-hack-into-roblox-scam-bots_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/new-how-to-get-1m-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-get-free-snacks-on-coin-master_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
stream_004_off00005094.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5094 29684 bytes
SHA-256: d8d43f89d7aa5b3bd2b6a72a8a6934a4ffadd738c4452702809ab868a6c6011c
font_01_sfnt_off000090e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E2 18448 bytes
SHA-256: b50316a99676df7f0166798da5ba9f86a9692887cac5eeee52f6cae7c69b43fb

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