Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6cb21c8910d2bc…

MALICIOUS

PDF

44.3 KB Created: 2021-04-27 16:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 05624119e0444f081466cccfbce7b1bc SHA-1: 90dee8b953fcc4020653d3392e01c7f20fcc15ca SHA-256: ac6cb21c8910d2bce7d0886dea47d1887211ca8cca19af1546a1144e76f4299b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of offering 'Roblox Admin Hacks' and generators. The document body and heuristics indicate a lure to download potentially malicious files, likely to distribute malware. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a malicious intent to trick users into downloading a payload.

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/roblox-admin-hack-download-2021-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/gamekit-roblox-free-robux.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-bc-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-build-your-dreams-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/best-free-outfit-in-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-downloads-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-script-greenwood-town-free-vampire.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/free-account-in-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-and-tickets-generator.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-money-cheats-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_off0000436e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x436E 24796 bytes
SHA-256: b8b985567023f4f577e621301fc9d400330896ed708857cbe6deadd373f4577b
font_01_sfnt_off00007c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C18 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off00008768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8768 19472 bytes
SHA-256: 7be6ca21ef1e7eb984f6ecdc6e56f4a19c10ccf3ac9097231c87c9252994fc87

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