Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ac7f2c3c06769c…

MALICIOUS

PDF

41.5 KB Created: 2021-05-18 00:51:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 231d7767bd77324b9a417efd72babbeb SHA-1: 1a43994a5c78202f3cdc50bd98d729d3ce7799d9 SHA-256: d7ac7f2c3c06769cbc0d9b17eca8e26bf7723549d206d5fc138e191b7c367d79
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 'game hacks' and 'free Robux'. The document body and extracted URLs suggest a social engineering lure to trick users into visiting these sites, which likely serve as a distribution point for further malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/today-coin-master-spin-free-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/abd-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/gamesofficenet-hack-coin-master_GM406889139.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
stream_003_off00004933.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4933 24424 bytes
SHA-256: ef33c2870a948463f9ff5923c26a89142bedf63a2d8aa7bba961e2d6fa944a6a
font_01_sfnt_off00008006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8006 18240 bytes
SHA-256: 27b55c0f12bb2febfdf1353eccca43892fc64465f725b8fb94f73ae96b41f02e

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