Malicious PDF — malware analysis report

Static analysis result for SHA-256 6998af8f3bc974eb…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 08:49:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf6e58050c4211e5758fbc765d1b1bb2 SHA-1: dcd05aeb4422c4b487e7e015a7066baa55d55d26 SHA-256: 6998af8f3bc974eb57ec094587b0dd7bf401b21c240a3cef1709b73cfa92641f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks or free generators. The document body, though heavily obfuscated, contains references to these lures and a primary redirect URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/wurst-112-2-game-hack In PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/robux-miner_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-official-page_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005427.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5427 24840 bytes
SHA-256: 8593f8adf5c5f97289c019c7d913e97b9a7cacf21a34d8a8b15065fff2484ae9
font_01_sfnt_off00008d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D78 3288 bytes
SHA-256: 9a94fd29766ab16fa830001e5c46849d6d6530bd8db209681d0dcb57fcc492f8
font_02_sfnt_off00009851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9851 17788 bytes
SHA-256: ce3f60beb4de00bcffae905034889af3c96f4f191e5c47ffd96b019a9d508339

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