Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f530706748eee9c…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 03:47:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7559931f1ba1379fe5c90de0f985aec8 SHA-1: 6c5d2e0a7c9d07bd2e77bb8fff5becc40131a2cf SHA-256: 3f530706748eee9cdf88cbcdc5d9943e4aea7073f646594795f4f74ee32f07dc
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body promoting free in-game currency generators for games like Robux and Coin Master. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, and the ML_NYX_PDF_MALICIOUS score is very high, suggesting malicious intent. The primary goal appears to be directing users to potentially malicious websites that host scams or malware.

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/431946152/free-robux-generator-no-survey-no-download-no-human-verification-game-hack
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/how-to-get-robux-without-paying_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/roblox-website-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/is-roblox-free-on-ps4_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/sb-game-hacker-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-el-tiger-card-free_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/earn-robux-by-watching-ads_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-gold-cards-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/hack-coin-master-iphone_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/hack-card-collection-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/awesome-roblox-outfits-for-free_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/hacking-commands-for-roblox_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/roblox-free-download_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/google-coin-master-free-spins_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-roblox-hair-to-wear_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-hack-apk-download-for-android_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-100-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e7.bin
7dcb21b6c5a0681f85737880757360f589fb0c34ec0b98db422eb52275cffdff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31E7 22200 bytes
font_01_sfnt_off00006322.bin
0ef666815fca28e6c6cf3435968b0c81522e44f0a8d83e831ed265583d1f0e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6322 20208 bytes

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