Malicious PDF — malware analysis report

Static analysis result for SHA-256 526a9997909595e5…

MALICIOUS

PDF

41.2 KB Created: 2021-05-04 11:24:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6da09e81eff420e650909e0290748321 SHA-1: b149faef0343771f28d1a0071eb8d7821118349f SHA-256: 526a9997909595e5d770508e06f74a38d45f3c9427e8f56551b6e1c2e626a6d8
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a direct link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to hacking and free items, aligning with common phishing lures. The presence of multiple embedded URLs further supports the malicious intent, likely to direct users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-hack-roblox In 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/robux-cheat-codes-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/mistplay-com-free-robux.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-hack-executor-level-7-download.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-nike-roblox-shirts.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/amon-magi-roblox-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/robux-free-gift-card.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-robux-for-free-com.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-robux-website-http-bitly-2gcisvw.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-on-roblox-apocalypse-rising-2021-august.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_off00004448.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4448 24936 bytes
SHA-256: 8486a4acf27e464b5e42fab0f58c1443b50c9bbdbf19d644d4228fcea35773a1
font_01_sfnt_off00007d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 18832 bytes
SHA-256: 51d9437e80e24546d075e83af5ade06a368f4b8fae4d07c1d083ec3d05b6f756

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