Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe25e62b8beba73…

MALICIOUS

PDF

47.1 KB Created: 2021-06-11 02:57:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bb656923bfba48d919902ab09970874d SHA-1: cab86475d59f522a478613fef157cdeabfec8a3c SHA-256: 3fe25e62b8beba73eed318b3ba04105c4877b9eca603e4e0a477e1288d3abcca
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are structured as SEO-optimized PDF files. The primary URL, 'https://netcdn.tw/app/431946152/donating-free-robux-game-hack', suggests a lure for game-related exploits or scams. The presence of a 'download button' heuristic further supports the malicious intent of directing users to download potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/donating-free-robux-game-hack
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/roblox-download-pc-free_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/mine-minecraft-games-for-free_GM479516143.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-best-link_GM406889139.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack-apk_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/robux-withdraw_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-on-roblox-pastebin_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-minecraft-skins-pc_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050b2.bin
684b169cde3d4a62d7284472034548170ba26c36e05c87acdee9b901a4542043		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B2 24876 bytes
font_01_sfnt_off000089ae.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89AE 2824 bytes
font_02_sfnt_off0000935d.bin
09b27fe024365e93ddee855141b32e2f10262e61eb9d53918d11548573ef351c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935D 18924 bytes

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