Malicious PDF — malware analysis report

Static analysis result for SHA-256 6118540ec4fba41c…

MALICIOUS

PDF

49.1 KB Created: 2021-05-19 09:26:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d20a1fec9002dca220be5064b514221 SHA-1: 2fa1fd2afe7f8b3cc3617b6518ded6870f95c7e9 SHA-256: 6118540ec4fba41cdf95ec821540a5542b1f77a0fec307504dbdb958879381f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious domain, disguised as free game hacks or generators. The embedded URLs and the heuristic firings indicate a social engineering tactic to lure users to potentially malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/roblox-com-free-game-hack In PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/pokemon-go-free-online_GM1094591345.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/roblox-ban_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.theecobuild.com/uploaded_files/userfiles/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://www.nrzroblox.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CC 25856 bytes
SHA-256: c4a5c62d63e250b6bf0c21d05819af46f7abd5b0719685d623d0a37356a4246f
font_01_sfnt_off00008461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8461 3964 bytes
SHA-256: f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
font_02_sfnt_off000091be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BE 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off00009db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB0 18208 bytes
SHA-256: 870646f3f52c1f0c0c96f328d01e02f351a6cd8131dd41c08f064fa7c3a02226