Malicious PDF — malware analysis report

Static analysis result for SHA-256 229d8ede8cc4c489…

MALICIOUS

PDF

42.5 KB Created: 2021-05-21 16:31:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eba7d7c2cb70e91ce28741aeaffccd75 SHA-1: 11eb4027994392deaee0e65defea0ab5ada07b73 SHA-256: 229d8ede8cc4c489f5cf0a241783c94f864e0bb3115c80cd0ddb884347a37e0d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9506

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/can-i-play-roblox-for-free-game-hack PDF link annotation
    • http://www.torvet11.dk/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.torvet11.dk/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://www.torvet11.dk/images/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://www.torvet11.dk/images/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://www.torvet11.dk/images/how-to-hack-roblox-games_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
stream_002_off000031b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B6 37380 bytes
SHA-256: 7bf657ea8d130044f8f520d58cc3a5cc8172f3192dd096756d66afe0ff933814
font_01_sfnt_off00008475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8475 18512 bytes
SHA-256: e7c9a4fe6870a820981f50b5265581c9404087a1dcd1112df2882e4616f18a1c

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