Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d66df2b2ec1b505…

MALICIOUS

PDF

40.5 KB Created: 2021-04-22 23:42:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b457e11df6e4863dbddad37d0692f577 SHA-1: 94a022e95d6ec29440a38a3fa105fe705e175aea SHA-256: 3d66df2b2ec1b505208e089969ffd243d26ca3e23f10a0704d11612f4a8b7f56
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with one specifically identified as a lure for game hacks and free currency. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a visual download button lure further support a malicious intent. The document likely aims to direct users to malicious sites that could lead to credential theft or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netsecure.pro/app/431946152/how-to-steal-roblox-shirts-free-bc-game-hack PDF link annotation
    • https://mayastisingkawang.com/__statics/gudangsoal/files/can-u-get-hacked-buying-robux.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/hacking-pokemon-reborn-roblox.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-robux-questions.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/roblox-cheat-engine-ccv.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/phoenix-hack-roblox.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/roblox-bux-hack.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/prison-life-free-robux.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy-step-by-step.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-free-robux-generator-no-human-verification.pdfIn PDF document text
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-use-cheat-engine-roblox.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
stream_003_off0000417f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x417F 24964 bytes
SHA-256: 4a5d94381bfc8c9944c40f738c313bb46f7f40d3ddbb7ab898734ac1d6c022dc
font_01_sfnt_off00007b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B55 18732 bytes
SHA-256: cad50cc4f80a335b3b0809c6041c3a28b86c81071796a6b2347e13b1bccb28bf

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