Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2ce57d10287a4d…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 22:41:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ed5021ca937eedea7d7bdb393ec6c939 SHA-1: c2471a3793b2df6e70c6a8851e13036aface66dd SHA-256: 8d2ce57d10287a4d0ab8ed313c8d5e7e58da758c98967bff4671c529a4d3cf99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular titles like Roblox and Coin Master. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-get-free-itunes-for-promo-codes-in-roblox-game-hack In PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/robux-win_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/robux-get-com_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/citizen-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/pokemon-go-free-incense-promo-code_GM1094591345.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/hacked-project-pokemon-roblox_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/robux-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/roblox-hacking-exploit-2021_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-free-robux-without-waiting-2021_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_off00002ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA8 21796 bytes
SHA-256: feb13b9a0888de81de0e7fc7c4b1c85494c68c8c80d88e59452edb2f40c2dc31
font_01_sfnt_off00005e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 19648 bytes
SHA-256: 26ac3eb5f66ac6a1ed8ef1c8ca52a5af3d2138f8e4314ef406839daf3c1351e6

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