Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d77c39247eb0491…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 12:20:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f23ecba048d5cae3d98cd110196d2ac2 SHA-1: fa6a29f02931a4f889c9d7f1398fda2a770fc888 SHA-256: 3d77c39247eb04910d1242c73b5ddaead01335a81571ed8bc12178a397bb3271
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as game hacks and generators, with a primary redirector identified as malicious. The document body and extracted URLs strongly suggest a lure for users seeking in-game advantages, likely leading to phishing or malware distribution sites. No scripts were extracted, but the PDF structure and embedded links indicate a social engineering attack.

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/how-to-hack-in-robux-2021-game-hack In PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-noclip-in-roblox-cheat-engine-67-2021_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/2021-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-retail-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-promo-code-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/what-to-do-if-your-roblox-account-has-been-hacked_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/hack-roblox-portable-robux-2021_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-hack-no-survey-no-password_GM431946152.pdfIn PDF document text
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F14 22260 bytes
SHA-256: 5388543f0a9bc097e71d4498630b11f574a1c27600add7412ef015273274d3ce
font_01_sfnt_off000060b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B6 19288 bytes
SHA-256: ccefcfeb147b6a2380d3cdee0166d4f9bc94c4efc3901684b722d15786a6ba2f

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