Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee127208d3c791f…

MALICIOUS

PDF

40.1 KB Created: 2021-05-20 23:40:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e540cad695ed260ed7bfe376726dc4b1 SHA-1: 5917e223c8b86c0650a439d40d2113f84e585eb9 SHA-256: aee127208d3c791f136fccc7adcfab3b99aa1eb2fea5593d30815f43b4d7b99f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a 'free generator / game hack' lure, specifically mentioning Robux. The document body reinforces this by containing phrases like 'Easy Ways To Get Free Robux' and a call to action to access a 'ROBLOX GENERATOR'. The embedded URLs likely lead to further phishing or malware distribution sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8018

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 https://netcdn.xyz/app/431946152/easy-ways-to-get-free-robux-game-hack PDF link annotation
    • http://1a-vermietung.com/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D3 25684 bytes
SHA-256: fc7055337ac7ff9b5bd1224fac0f095c6e5baeedb4498c1e54b9995a35fd98aa
font_01_sfnt_off00006d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2D 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000079d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D4 18724 bytes
SHA-256: ff2b5f5648817baecf5754646eae61914eefadf3856a555e8e6cbc13d6b08405

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