Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ae67076fe44513…

MALICIOUS

PDF

42.4 KB Created: 2021-05-02 14:36:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c9d0b646f2419155d940c99c6c194913 SHA-1: a55b4c48eda94d6eca98ac00a584ae9fd61a3453 SHA-256: 27ae67076fe4451332b188d966fcf9d7007d06281910c7e06de6abe15a435116
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a call-to-action lure for 'Free Robux', indicating a phishing or scam attempt. The heuristic 'SE_SECURITY_BYPASS' suggests the document may instruct users to disable security software, which is a high-risk behavior. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to download a second-stage payload.

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/free-robux-lucky-patcher-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-roblox-to-play-right-now.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/free-robux-generator-website.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/speed-run-4-roblox-cheats.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/earn-robux-today-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-play-heroes-online-roblox-for-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/ccv3-cheat-engine-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/inside-the-world-of-roblox-pdf-free-download.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/free-tay-k-roblox-shirt.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-suit-not-deflaut.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-in-roblox-to-get-robux.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004288.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4288 27608 bytes
SHA-256: 401410acb418db07aba5c75070797ce8016beda5786dbc0121a7524f9271805d
font_01_sfnt_off00008239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8239 19016 bytes
SHA-256: 331ebefa39d6af79266d68b19ee1a00012a786897107d243c80df090902542d3

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