Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2c82cfa19e6bb9…

MALICIOUS

PDF

38.4 KB Created: 2021-05-21 08:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 83f1ca10d846c1bdaeda25eaf4d36190 SHA-1: 0bffebf4d655897ae1b38dca5b0c819ae477502f SHA-256: 7f2c82cfa19e6bb9bdaf5cd6e6650a7f5256cf319a2140f075389768d7207cd1
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to 'free Robux' and 'game hacks', directing users to external URLs. The presence of urgency and download button lures further supports a malicious intent to trick users into downloading a payload. No scripts were extracted, but the embedded URLs are highly suspicious and likely lead to malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/free-robux-game-hack PDF link annotation
    • http://sudamericarural.org/images/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-hack-roblox-on-mobile_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_off000033cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33CB 28728 bytes
SHA-256: 9b3bf6893e001e30a9615ad5a80a899b2551abd413bf44212ab08aba984ec34b
font_01_sfnt_off000075c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C5 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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