Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd3be71ced7a278…

MALICIOUS

PDF

41.7 KB Created: 2021-04-29 09:24:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 673d9124acdf7b84e1559326e5287f53 SHA-1: 8358df5873e2c9cdbd13da35e893335a396e597b SHA-256: 9dd3be71ced7a278b1c7384bd0120585633eb27c7189a6d302dedbea5bb77426
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded URLs and a document body that suggests a lure for downloading game hacks, specifically for Roblox. The presence of a security bypass heuristic indicates an attempt to trick the user into disabling protective measures, likely to facilitate the download and execution of a malicious payload. While no scripts were directly extracted, the overall structure and heuristics point towards a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.xyz/app/431946152/roblox-cant-die-hack-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-restaurant-tycoon-hack-lua-c.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/tshirt-nike-for-free-roblox-of-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-no-task.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-rs-obc-tbc-bc-gain-95-2021-free-robuxs.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-cheat-in-roblox-prison-life.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-sans-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-john-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-and-tix-button-game.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-best-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-vampire-hunters-2-going-through-walls-hack.pdfIn PDF document text
    • https://freerobux.cyouIn 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_003_off000043df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43DF 26748 bytes
SHA-256: 38ce5a97a6889b4cc4b2678288f342a46ae7366f152563f658a4ac6dd40b533f
font_01_sfnt_off0000807e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 18572 bytes
SHA-256: d020c5b38e3daed66c2d989b6885c58349a9fa47154eb318bd7f6e8cb3fc0cf4

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