Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec78dbab2da404b…

MALICIOUS

PDF

36.7 KB Created: 2021-05-11 17:33:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 31623a899ea6682d8ccb2055499b7955 SHA-1: efb9e7ac4c002a66342fe4755df6177396e203e1 SHA-256: 2ec78dbab2da404bd8def2bd104a8c0b24cc2d7f6b0296caf88138d1768b75c5
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to a suspicious URL. The document body also contains text related to accessing a Roblox generator, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing attempt to redirect users to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/robux-free-co-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003207.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3207 27776 bytes
SHA-256: 70de902323369e930349b5fb11ac4b1b43b464a56abe7cd92a12500c1060df9a
font_01_sfnt_off00006edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDD 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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