Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d0f7fc77de9036…

MALICIOUS

PDF

32.0 KB Created: 2021-07-19 11:31:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3ebf717d12dbba77d913b7e3cedcefc5 SHA-1: 128cc33afb880dc62f74e3c12c45b4884d414ac2 SHA-256: 66d0f7fc77de90368370278bb19e4bbcb4e22f250e6416ec3b93f0de67ef91b2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to 'Free Robux Hack' and contains multiple embedded URLs pointing to potentially malicious sites. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests a scam or phishing attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9452

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 http://netcdn.tw/app/431946152/free-robux-hack-no-human-verification-game-hack PDF link annotation
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-100-robux_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_off00002644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2644 22588 bytes
SHA-256: f8138f6ddf158ff1ba038d84979df315165cb466bfc7f5d805abf2a1e88b3b2c
font_01_sfnt_off000058c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C9 19216 bytes
SHA-256: e0f254d6bdc22578be9872c5e472ec3e587f5271bc56725c7cf8f1860bbc5ee3

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