Malicious PDF — malware analysis report

Static analysis result for SHA-256 9135ee783c1b43f6…

MALICIOUS

PDF

33.0 KB Created: 2021-06-18 06:19:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2b4216e00e3a46a598678e2b58410f99 SHA-1: 0d1af9fe0738f93b54f1a2904bfd4e50bbd9cd4e SHA-256: 9135ee783c1b43f6761c3918e594048ace2929deac577186d1dc8935627dc061
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that promote a 'Roblox Speed Client Hack' and directs users to a URL that is flagged as a malicious redirector. The document's content and the presence of a download button lure suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted from this sample, but the embedded URL is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-speed-client-hack-2021-game-hack In PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/earn-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/microsoft-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-robux-codes-2021_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_off000029d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29D2 22064 bytes
SHA-256: 222a3d3af68941fd4b73de0a2fad0f03e268c13bd8041d847c3f42a863aeab3c
font_01_sfnt_off00005a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A99 19448 bytes
SHA-256: dbcbbfd129fed6a251d9e7f9da8a5218def2f18543e72f734e827d08032f247d

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