Malicious PDF — malware analysis report

Static analysis result for SHA-256 e597f06234d6c47d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 05:33:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8a55c3733e1cd4906e4504eff58df4aa SHA-1: e3edfc23765c828d25d54d5656a420440576ed4f SHA-256: e597f06234d6c47d890bbb85a837539e1556bc46dbf0f9e178cd81df2ee65fdd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, designed to lure users into clicking for free game currency or hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt related to popular online games. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a high likelihood of further malicious activity upon user interaction.

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.tw/app/431946152/how-to-get-free-robux-easy-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-robbery-simulator-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/robux-hack-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-robux-hack-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/robux-hack-just-put-user_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/hacking-games-roblox_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-hack-god-mode-phantom-forces_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_off00002fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCA 22636 bytes
SHA-256: bb6db2c117373a92a68468b7502ff9a18b821026f3877477dc228f01fcd41d2e
font_01_sfnt_off00006294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 19164 bytes
SHA-256: 0d91da27a3fd2071a1294b90674c0de4394c4ddf99a76a86a264892d4088a75d

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