Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc05164108466ab4…

MALICIOUS

PDF

43.0 KB Created: 2021-04-26 18:48:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8a7423aee23a2313ba7f3d6ad8da6334 SHA-1: 4d51bd13ea56fc52c13392875fc7c3659bb698b1 SHA-256: cc05164108466ab4aca8ae336f0ab89e5c9a7fbd4e6d4eb67f8d7ae64f5e1964
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of redirector links for a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-phantom-forces-all-guns-free-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-boxing-simulator-2-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-on-cheat-engine.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/gg-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-roblox-descargar-pc.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/como-hackear-cuentas-de-roblox-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hack-no-verification-legit.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/concole-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-robux-simulator.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-avatar-clothes.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/black-shirt-roblox-free.pdfIn 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_off00004364.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4364 28856 bytes
SHA-256: b145ea96a23bc54cf55aea2cfd8a6a8bd8e0f737c094e5477a5a6aedde082a9d
font_01_sfnt_off00008485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8485 19000 bytes
SHA-256: 116a7d787ab142258d84e9526a5a58b02d8d01ef0d126df9de01c13e6a65986c

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