Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc1a09f1dece423…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 19:23:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2a50c85efc446338a778f40155a2e554 SHA-1: a2ffc460b25eb128f447a693dd3072134ebb8e03 SHA-256: 5cc1a09f1dece423c05465dea314d271d39edbe60024a6d2fdbe25657b1639fc
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links and embedded text related to game hacks and free Robux, directing users to malicious URLs. The presence of a known malicious redirector infrastructure and a direct link to an IP address indicates a clear intent to lure users to potentially harmful sites. While no scripts were explicitly extracted, the document's structure and embedded links strongly suggest it's designed to exploit user interest in gaming rewards to deliver further malicious 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/431946152/robux-place-rewards-game-hack In PDF document text
    • http://118.98.227.172/opac/repository/hack-in-roblox-2021_GM431946152.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/how-to-hack-tycoon-money-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/infinite-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/get-robux-free-for-reel-no-get-someting-free-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-hacks-for-epic-minigames_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/pokemon-go-free-joystick-hack_GM1094591345.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-neon-blue-tie-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-robux-hack-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hack-roblox-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-brown-pant-roblox_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_off000032e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E1 22376 bytes
SHA-256: b6d21c95de05229e4361770d382c848dd59e554282741c33f53a61082c3fa3b7
font_01_sfnt_off000064de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 19116 bytes
SHA-256: a933a656e1049a1ea0983529715a306b6a61fd2e40f1a6b23de6919a7e4aad6a

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