Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b49e77ac1e24027…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 03:06:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8ee37f287b70781f12fb9a83ffa161ac SHA-1: 0716a7008462b031ddeeb5a1d404184df11deaa0 SHA-256: 3b49e77ac1e24027eaf548f9938dceeffe8f1110d3f20bc355aeba479b3beeef
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 0.9971

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 https://netcdn.xyz/app/406889139/free-spin-in-coin-master-game-hack PDF link annotation
    • http://sauer-umweltservice.de/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://sauer-umweltservice.de/images/hack-free-spin-coin-master_GM406889139.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_off00004900.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4900 24756 bytes
SHA-256: db387503edca0e5e5f2ee319d3b445f400a00482664ae0dd699f74d78caacf89
font_01_sfnt_off000081b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B3 17884 bytes
SHA-256: d73da77b5a1bbc7a2b5b207bcae6a8efd78ccb1f3c8a04009520d94079973ddb

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