Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e9bdaacc8d0983…

MALICIOUS

PDF

40.3 KB Created: 2021-04-22 14:52:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 05958e28667b57108122a532c695325c SHA-1: 4da6d1e4aafc7720cff671e4055b48e26b400a4b SHA-256: 13e9bdaacc8d09831b675a03802a44c43669f24a4af18a19592ccef57c283899
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 0.8963

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://netsecure.pro/app/431946152/adopt-me-roblox-getting-hacked-game-hack PDF link annotation
    • http://oca.undil.tl/repository/free-roblox-selena-quintanilla.pdfIn PDF document text
    • http://oca.undil.tl/repository/cheats-to-get-free-robux.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003b4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3B4F 27676 bytes
SHA-256: 1b6b4224b1289b9581618f7d7f18f567e5fcbf22ba526f7832ef34cc045f9228
font_01_sfnt_off00007939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7939 19240 bytes
SHA-256: 15148b5c89d849f0906079db15e1570a4f836a3c9d1dfe8341b8c9bb22f8c6d3

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