Malicious PDF — malware analysis report

Static analysis result for SHA-256 427f9037934d282f…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 02:36:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aa9f58957969474285acdaf7be86cf1e SHA-1: 49e3210dac3d86804db80ea9ae7b69e13bd176ad SHA-256: 427f9037934d282faba781b3acba9a169e0312df8afe19f6f3fb4e3b31d7cc2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites that are identified as malicious redirectors. The document body and embedded links suggest a lure for game-related hacks or cheats, aiming to trick users into downloading further malicious content. The presence of multiple redirector links indicates a high likelihood of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coins-coin-master-hack-game-hack In PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-game-hunter_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_003_off00004968.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4968 24508 bytes
SHA-256: 6c425ce54fa69bf68fda39b2d9c4b047921a411b8d00ab973e840df3139a9105
font_01_sfnt_off00008109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8109 17880 bytes
SHA-256: d4b290fbe96f806a63e53895600235ad07ee700a50234ed47d5e5eeda0b1e0de

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