Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e83351765eba26c…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 01:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 212ef473bb4059a3f5deaf263a3388b7 SHA-1: 80f7751c91cae17f48f7b81aaa622b84016d35c8 SHA-256: 1e83351765eba26cd48636e06efdd93f09252e6d6cd2102d0c4fd242a7d6fc4f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game-related cheats and currency, likely to trick users into downloading further malware or visiting malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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/roblox-install-free-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hacks-robux-apk_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-hack-the-roblox-birthday-system_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-do-you-get-the-hack-no-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/best-games-on-roblox-that-are-free-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-pillow-simulator-free-pillows_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-zombie-animation-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/robux-come_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/egg-farm-simulator-roblox-hack_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_off00002efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFA 22064 bytes
SHA-256: b7f4d3da17a1cbf2a58d9699b976af8f9cfd25f2657cc53a271df286e8426555
font_01_sfnt_off00005ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF2 18752 bytes
SHA-256: 1d55b3fd9f6369f8e68c2ca1b9c300169a68fb96c94d2ac67d1ae5c18d40cf4f

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