Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cb1ebbb1b4d62c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-24 07:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4975fa36adb5e3e9df79f2fcd67f14c SHA-1: be824f0fe1153b857fe8b598c96b54c4c507ea9d SHA-256: e3cb1ebbb1b4d62ca751621d75b835786ec9a2ca9ceab2bc6f8366281e835d30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a source for free game hacks and codes. It contains embedded links that redirect to malicious infrastructure, specifically http://netcdn.co/app/431946152/free-robux-card-codes-game-hack. The document's structure and embedded URLs strongly suggest it is part of a phishing or scam campaign aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirector links is a critical indicator of malicious intent.

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/free-robux-card-codes-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/descargar-menu-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-get-bc-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/claim-free-robuxcom_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-hack-khol-admin-house_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-2021-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-a-roblox-player_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/tiktok-free-unblocked_GM835599320.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/before-dawn-hack-roblox-pastbin_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-com-free-robux_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_off0000304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304A 22312 bytes
SHA-256: cc36b153ca463dc74eaca3a1668aa6ff63e44dc72ccf28637e27363bf049c72c
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 18888 bytes
SHA-256: 6c6de0ceaed5fc014d3dcce92ca1cb896bf7995edf6e50a0e815779b2f83a656

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