Malicious PDF — malware analysis report

Static analysis result for SHA-256 54625ee934bf62e8…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 23:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 492f25bd4984fb4a1cc5b23ac6849b36 SHA-1: 68c7d488fb00d391095c3d4fe9a2f31a789b5d72 SHA-256: 54625ee934bf62e86918c87cf3cc63af9c91ceebf24df9f5c7302d44c38d7e95
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to resources related to game hacks and cheats. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to lure users to download potentially harmful files. The document body itself contains URLs that are likely part of this lure.

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.co/app/431946152/counter-blox-roblox-offensive-hacks-2021-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/roblox-fe-btools-script-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-items-on-to-your-account_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cheat-codes-for-theme-park-tycoon-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-teleport-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-on-roblox-deinsdaily_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/forts-update-the-northern-frontier-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-hacks-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacks-for-roblox-parkour_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/como-ser-hacker-en-roblox-jailbreak-2021_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
stream_002_off00002da9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DA9 22724 bytes
SHA-256: bcc5a398ac7f4b06fa59869b6188ffc03dde708ffcf18de295bfb6cf1e9ea301
font_01_sfnt_off00006059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 19536 bytes
SHA-256: 79214a24b664af52a262a75b87da172f391e051f7b7a22a375686560b0904378

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