Malicious PDF — malware analysis report

Static analysis result for SHA-256 1750bc6bd2b71b5b…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 16:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f4f64e8e92c2451067f867b3863c4749 SHA-1: 0ce7ad8c04e0fe7f69535a7c609e9d7276f1d618 SHA-256: 1750bc6bd2b71b5b73d4d2bc9f97cfd64101c52932374342a047b6c914501570
142 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to deceive users into downloading potentially malicious files. The document contains numerous links to external resources, many of which are SEO-optimized PDF files related to game hacks and cheats. The presence of a fake CAPTCHA and a high ML classifier score indicate a malicious intent to trick users into executing further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/roblox-no-scope-sniping-hack-game-hack
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hack_GM406889139.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/fan-page-coin-master_GM406889139.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/free-roebucks-com_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/best-free-robux-sites_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/free-spins-for-coin-masters_GM406889139.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-july-2021_GM406889139.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/free-minecraft-skin-creator_GM479516143.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/coin-master-mod-version-free-download-v344_GM406889139.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/roblox-piano-hack_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/free-robux-meme_GM431946152.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/minecraft-tower-defense-hacked_GM479516143.pdf
    • https://e-learning.man2garut.sch.id/__statics/gudangsoal/files/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054e9.bin
23378402e11c07bc7f36da0a32bd4542ecbce945abc985facd2dd6d760fd8aa8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54E9 26628 bytes
font_01_sfnt_off00009255.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 2824 bytes
font_02_sfnt_off00009c04.bin
751ae83db2de2c8fc41ac20a9f0711bbf87487bb5f4b3642e8d82fbd168e10ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C04 18764 bytes

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