Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fedd7c73bc12e87…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 10:33:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9fc89f357917de59088c698c9d59ecba SHA-1: 4ac1a9f1415821a97f851e9a8fef3724e84b2163 SHA-256: 6fedd7c73bc12e87d5f4480e307e3085bbb7dcde72c10ef4856c218cb52ee236
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to malicious infrastructure, specifically advertising free game items and accounts. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it uses a lure for game hacks and redirects to known malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent, likely leading to credential harvesting or further malware delivery.

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.
  • 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 http://netcdn.co/app/479516143/free-minecraft-java-account-game-hack In PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/avatar-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-code-sharbites-roblox_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/top-10-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-how-to-hack-in-blob-simulator_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-get-priviate-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.woundcare4heroes.org.uk/uploads/files/files/cheat-car-crusher-2-update-11-roblox_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_off00003013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3013 21920 bytes
SHA-256: 3984977b56342e5befb1cd7c37e57fbb4864966f611601b99b386eaaa58fd2fd
font_01_sfnt_off0000602b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 18420 bytes
SHA-256: 1c3f9368ae9341fd87c323918a5db0c95def7528b1578e993c766083598f8ad6

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