Malicious PDF — malware analysis report

Static analysis result for SHA-256 411b8e7d6105ca81…

MALICIOUS

PDF

47.4 KB Created: 2021-05-14 02:31:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f20d0af839e39c7280a2d9a60f5d1403 SHA-1: d3fc8f5bef8670ba55104001f461e2c715afdf1f SHA-256: 411b8e7d6105ca8103ab81635e4a2b5b2552aea3d649169c2673838356b88524
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'free Robux generators' and game hacks. The document body and embedded links suggest a social engineering lure to drive traffic to potentially malicious or scam-related content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a high likelihood of redirecting users to harmful sites, possibly as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/free-robux-generator-no-verification-2021-game-hack In PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/com-roblox_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/robux-app_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C18 24988 bytes
SHA-256: 7f61b95f4659a282d3e8737953c27a72d49c3d3e6aecb1f311394f0dfe1832ca
font_01_sfnt_off000084a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A6 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off000094b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B7 19004 bytes
SHA-256: d45ec0ea85e3f4da21cb27ccd2cd6df352304457fff04a0939a67aeffe4f8bf1

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