Malicious PDF — malware analysis report

Static analysis result for SHA-256 c578305d11c97874…

MALICIOUS

PDF

44.3 KB Created: 2021-04-30 05:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 469b2c7ba54b8630f7663f542657c112 SHA-1: d0e88d00786a2ca5b01edb9e92cf194e4f609ba8 SHA-256: c578305d11c97874179cd4ccf245f09ccf70d26e465c151be381f7541f5efd6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into downloading or accessing game hacks, specifically for Roblox. One critical heuristic identified a link to known malicious redirector infrastructure, which is the primary indicator of malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest a phishing or social engineering attack aimed at driving traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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/hack-esp-roblox-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-shirt-templates-for-roblox-2021.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/roblox-crc7-hack-admin-code.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-boys-shirts-roblox-codes.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-play-no-app.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-hack-2021.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/how-to-get-the-doge-package-for-free-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-legit-no-survey.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/admin-panel-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-gift-card-free-codes-2021.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004275.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4275 27288 bytes
SHA-256: 7b3daaf79c4293df4e529c8b48b7d8142b4f994856f5ce11214f290bd6ac0447
font_01_sfnt_off000080fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FC 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABD 18356 bytes
SHA-256: 265a3a1e1f31c094710d7f32e11b91f0a0616155571e8281432943dd428baff0

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