Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7a23fdf520b420…

MALICIOUS

PDF

36.2 KB Created: 2021-05-21 12:00:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6f9c04e928ad4522778555020cae7ee7 SHA-1: 94f9387ad9856701710d1a37afb09f50c42e23d8 SHA-256: 3a7a23fdf520b42065ca7255da7a95147d418c63e74bdfa921c925cc30d56030
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure and directs users to external URLs associated with game hacks. The embedded URLs and document body text strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-roblox-boy-hair-game-hack PDF link annotation
    • http://swibome.nl/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://swibome.nl/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://swibome.nl/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://swibome.nl/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://swibome.nl/images/how-do-i-earn-robux_GM431946152.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_002_off000031b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B3 24928 bytes
SHA-256: cf47e466e9302ca420c755ce2a52bf980bfe2b562acb9b65a5715126feff9a7d
font_01_sfnt_off00006b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 18476 bytes
SHA-256: abd17b12d4ec9235048d2e50423b5fb352a1237d763ee393d990d2a1127b11f9

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