Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1099f3c19f5c6ab…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 12:33:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 90b86cdb5c7cc7e4f2f32287b042f5db SHA-1: 8544611325829e992ca3fd1c88468573f95f30b7 SHA-256: e1099f3c19f5c6ab89db449fd7cdfc2c9c7abc7506d3bf4108ceb77cd80cf6db
180 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free currency to trick users into clicking malicious links. It contains multiple embedded URLs pointing to a redirector and further PDFs hosted on an IP address, suggesting a multi-stage download or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of redirector links and IP-based URLs are high-confidence indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/roblox-freeze-tag-hack-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/hack-para-jailbreak-roblox-pc_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-girl-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-games-that-you-can-play-online-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/cyber-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-robux-for-fre_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/advertise-for-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-mineverse-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-bit-slicer-hacks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-studio-free-robux_GM431946152.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_off00003021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3021 22240 bytes
SHA-256: 7f76ffc4de01cbecb106291a04bf72e984b040aa02ba140ef1162aeedb1ec5d4
font_01_sfnt_off00006198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6198 18904 bytes
SHA-256: 7ee9ca72b2b2f3365cde429f75775244ac059ce641d26d5a5e5430e8feba453e

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