Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b8bf45a78d7001…

MALICIOUS

PDF

40.1 KB Created: 2021-04-30 08:47:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6c6f9089bc0ee0feb6c70dcff068aeb3 SHA-1: aaf48ac27358ca7e25eb1d0d1840c2044b2d47d4 SHA-256: b8b8bf45a78d700163ab4f33449a96a956e1a94959e03dac75cb7825adeb3b9b
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a 'free maps Roblox game hack'. The document body, though heavily obfuscated, contains references to the primary malicious URL. The presence of these links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/free-maps-roblox-game-hack In PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-hack-november-2021.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/free-dragon-ball-z-skin-roblox.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-hack-build-your-own-boat.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/robux-card-free-codes.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-get-a-free-gamepass-on-roblox-2021.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/chat-hack-roblox-script.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-ios.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-get-the-holiday-crown-in-roblox-for-free.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-troll-players-inject-script-hack-pastebin.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-hack-robux-2021-download.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
font_00_sfnt_off00004142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4142 25592 bytes
SHA-256: fea84f7d0fe755d75bb6371be51fb6d3ba04bb4fd39aa65ee2aa0ca253abc511
font_01_sfnt_off00007a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2B 18548 bytes
SHA-256: f8f9ce8a9619d9a1f83c1281bf289cde132ff53606bb53a7ab4181ed872861a6

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