Malicious PDF — malware analysis report

Static analysis result for SHA-256 3388d4edfdb775fb…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 04:55:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ccf0b58c521a15190d5f535332d9b55c SHA-1: db305ff93b1d4fe674792853a93c7ce28930ccd7 SHA-256: 3388d4edfdb775fb2d04d2df5d2d72a4d2d0a5df384778509d1a3b5986e0f261
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external resources, many of which are SEO-optimized PDFs related to game hacks and cheats. One prominent URL, http://netcdn.tw/app/479516143/make-your-own-minecraft-server-free-game-hack, suggests a malicious download or exploit attempt. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to trick users into downloading harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/make-your-own-minecraft-server-free-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/2021-best-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-vehicle-simulator-cheat-money-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/wij-indigo-ii-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-redeem-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-equip-the-free-item-in-roblox-deathrun_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-code-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/games-that-you-play-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-pastebin-not-patched_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-2021-generator_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-online-game-for-windows-7_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/dragon-blox-x-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-bandit-hack_GM431946152.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_off000032f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F4 21864 bytes
SHA-256: 4645bde58bdcd085cfabf3e92a2007c81d79ee88b20f2206ac90598e1c754f50
font_01_sfnt_off0000632a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 18748 bytes
SHA-256: 63003ec613419245968a2153146fc981bbf37ebedebab2f7b5ca0331e325602d

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