Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6794ea7bb7bd51b…

MALICIOUS

PDF

49.9 KB Created: 2021-06-03 08:57:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 07db00a18b5b46cbc8538dac1b221364 SHA-1: 015ad5b8655a6a1410c84a51622648f94e1476d1 SHA-256: f6794ea7bb7bd51b44f4ea02c9f6fda50b3dc2488cb53042b243b08ab4d5853c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as a 'game hack' generator. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering lure designed to lead the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/how-to-hack-roblox-accounts-for-robux-game-hack In PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/rbx-hut_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/make-free-robux_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://en.gzyuquan.com/Public/upload/editorfiles/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005093.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5093 28616 bytes
SHA-256: 8042ca26a87fadc191c14a5594588c6e057ade5b9a9a9cb758fa64397747861f
font_01_sfnt_off0000925b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925B 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F03 18756 bytes
SHA-256: 937dc084e295f5db9e9abf98e8d9ece9a75bef1f1a22520950dbcf80e1ec543e

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