Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f87c52d80f796fe…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 09:25:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0757461fa5b53c59a97cb882c6f9758f SHA-1: 46a2b7a2c458e388fb677947ca4e74676b8f2c0f SHA-256: 5f87c52d80f796fe82cb6463eaa9d2dde49fb1d6051a3a8b6d0c96f8f39e02d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators' for popular games. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-fly-hack-game-hack, which is flagged as a known malicious redirector. The document's content and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-fly-hack-game-hack In PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-roblox-vip-strucid-server_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-do-u-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-no-surey-for-kids_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-money-codes-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-cheat-on-roblox-giant-dance-off_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-ro-ghoul-free-vip-server_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/genarater-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/packet-of-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/fly-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-coin-master-spin-and-coin-link_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
font_00_sfnt_off000031e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E1 22400 bytes
SHA-256: 41883a82bda2df4eea5c3b52d532036778de66c508c2d545d9fc83583153d199
font_01_sfnt_off00006363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 18280 bytes
SHA-256: 56f87322d6175f5188b2f3e54b3290a6e5898c7bed8f3d8c577e55e984b17e01

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