Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d974fee959c784…

MALICIOUS

PDF

34.5 KB Created: 2021-06-22 05:57:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ea8bc06a6d4b7fa5fa09fba3c3c295f7 SHA-1: e549ff29ce9e607144434b4ed3cb3da3f9a6141a SHA-256: 09d974fee959c7840eedd46b17e4278fd517e3d9020cd6f95c4ad115f37745be
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and cheats, such as 'how-to-cheat-robux-in-roblox-2021-game-hack'. This pattern, combined with heuristics indicating malicious redirectors and a general ML classification of maliciousness, strongly suggests a phishing or malware distribution attempt. The document body and embedded links are designed to lure users into clicking through to potentially harmful content.

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/how-to-cheat-robux-in-roblox-2021-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-make-a-group-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/boku-no-roblox-hack-script-auto-farm_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/pubg-uc-key_GM1330123889.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-speed-run-4-cheats_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-sign-up_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-top_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-hack-generator_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_off00002ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC0 22376 bytes
SHA-256: 5c958a1b62a3e8e0af53cd32a5717172f240c8572e4486d40ad59222b9fbdbd4
font_01_sfnt_off0000608a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 19464 bytes
SHA-256: 36ac185aa2e6096528cc000a7f5bd1e21ba0b6ba43a0e2c2d463d4e637a73610

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