Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dafc2f60bafb817…

MALICIOUS

PDF

44.5 KB Created: 2021-06-13 20:27:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2ce475c322b66545fd1398b7698d7018 SHA-1: 88daf42127b30c125c2c597f3be08ca336134b58 SHA-256: 4dafc2f60bafb817c0f42501736ab2ec8f24795e4f5fd7e34fe7e423077fa6fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, specifically advertising free game hacks and Robux generators. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it uses a lure common in phishing campaigns. While no scripts were explicitly extracted, the nature of the redirector suggests it is designed to download and execute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-admin-robux-game-hack In PDF document text
    • https://eleganceautospa.ca/images/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://eleganceautospa.ca/images/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-hack-roblox-sites_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/como-descargar-hacks-para-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/nonsense-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-roblox-estudios_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-rich-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-da-hood-hack-script_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-ave-a-code-for-robux-free_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-free-robux-no-hack-no-inspect-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/minecraft-hack-mod_GM479516143.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_off000048b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B4 29520 bytes
SHA-256: 4e75df353f43acd709e3a885541012657c02f6369ab3b38de150f328a58ee4f6
font_01_sfnt_off00008b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2A 18568 bytes
SHA-256: 51a1decb8db4c4c9c3abe1f725bb78c2fd0d020e98a7d70314dff0768c8ccca8

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