Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ecfff67ecf6cd5…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 13:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c05e478fdef2fde254acc44fd958233a SHA-1: a58623b9cde193e62beb421defd3d86b3ff452c9 SHA-256: 54ecfff67ecf6cd5c63286b4215eb7c43ae8b76f8935296d111e400cfecf6029
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, promising free game currency or hacks. The primary redirector URL, https://netcdn.online/app/431946152/huskybuscom-free-robux-game-hack, is flagged as malicious. The document's structure and embedded links suggest an attempt to drive users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/huskybuscom-free-robux-game-hack In PDF document text
    • https://www.armera.co.uk/uploads/files/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/pokemon-go-free-100-iv-coordinates_GM1094591345.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/xray-hack_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-army-free-robux_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
stream_004_off0000519b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519B 26464 bytes
SHA-256: 50c33ee4a520bdbccd970eab61cadfc128c45d3ba08f463d207017f64f206004
font_01_sfnt_off00008d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D93 18624 bytes
SHA-256: f893a3bff8774b7ed5d4e22eaab63b6b5727efd4274e33d815ecbde6c17ee355

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