Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb10527d02ad625…

MALICIOUS

PDF

41.4 KB Created: 2021-05-17 01:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8eab9b5a6f07f5d9fa03ac107b95e779 SHA-1: 7322f93015ecd8ee8a2e4901b617dbcd164663c9 SHA-256: ecb10527d02ad625891b38c059cb8dc5d7ca92f02feca3e650ddc10e1e191946
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting game hacks and free in-game currency lures. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/how-to-hack-roblox-2021-game-hack In PDF document text
    • http://grafi-web.be/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/www-robux-us_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://grafi-web.be/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://grafi-web.be/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://grafi-web.be/images/coin-master-hack-download_GM406889139.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_off00004694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4694 24136 bytes
SHA-256: 12396d096bf990d09d0b0845679bd209bbf4f7f37324cbf39b6fc29529cdbf22
font_01_sfnt_off00007dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 18748 bytes
SHA-256: 82830e686af2a9787477f8716b243dfdc4e826425849e85a18f820c98dc205f5

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