Malicious PDF — malware analysis report

Static analysis result for SHA-256 b795a10bd8225f75…

MALICIOUS

PDF

32.0 KB Created: 2021-07-20 23:12:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b988c8d60733df86586e0f326ab85bdd SHA-1: 2b90c084cff6208cee97fedcaafd674bdad551e9 SHA-256: b795a10bd8225f75a88fa6f99afb92a9aeeb45da8baa92497b4c2640f636a889
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 0.9900

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 http://netcdn.tw/app/431946152/how-can-i-get-free-robux-game-hack PDF link annotation
    • http://shapemybrows.id/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://shapemybrows.id/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/roblox-help-free-robux_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_003_off000059be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x59BE 18696 bytes
SHA-256: 33c25fa0f0619f2cda2fe769af4286604c5d5c5a694e01b8664c01c1f579078d
font_00_sfnt_off00002805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2805 22380 bytes
SHA-256: 27d690597688f1f9283666b33f60ac83e9e4ef8a8ba8a9907972b78468fe24a7

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