Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbb484f5c677bfd…

MALICIOUS

PDF

34.0 KB Created: 2021-06-26 07:13:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9887f15fbcf7c054fdf553565de70aab SHA-1: 3507e48a16f66aca118d2d81d44e8e3fc9fa4b79 SHA-256: 3bbb484f5c677bfde68a1152d7cac69d33f111f281ac373cb8797a434380a559
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks, consistent with a phishing or scam campaign. The document body and embedded URLs suggest the intent is to trick users into visiting malicious sites, likely to download further malware or harvest credentials. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/hack-to-make-you-move-in-roblox-game-hack In 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/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-hack-roblox-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-free-robux-202100_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-robux-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_off00002e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E60 22108 bytes
SHA-256: 41c1f48f88c0f33089e88d34683fe2b9f05b032f2ea363d0296e023013a9ddc5
font_01_sfnt_off00005f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F29 19268 bytes
SHA-256: df446091d412e1d4e83d9d8bdc3d86b510e9848422c175dee90c66b16b6a47cb

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