Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07c885db60a9b2f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 15:43:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 519b9bed6db9aa704029abe42bfb8a98 SHA-1: e7b9b1f23e5d462ceef2627dd665db47469d728a SHA-256: f07c885db60a9b2f201c13a6e1446bb4055659c0958d0bfe389ffb2858fa2b6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising free game hacks and currency. The heuristic firings indicate the document is designed as a lure, likely to trick users into visiting a malicious site. No scripts were extracted, but the presence of malicious redirector links and the ML classifier output strongly suggest a malicious intent to lead users to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-no-generator-game-hack In PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-get-robux-on-phone_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
font_00_sfnt_off00003331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3331 22360 bytes
SHA-256: 0173f30195fd631d31b48f025e64456f3d0682dbcadbc0cffd1575ba45231dde
font_01_sfnt_off000064fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FC 18820 bytes
SHA-256: 261ea0d489a423ac242e977cf9c2ebb558fc055835ac2ff71b731d45313ea59b

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