Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5357bd807ded7e…

MALICIOUS

PDF

43.5 KB Created: 2021-06-14 01:22:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8d52fb717223cbd2ef780bbe41060ea4 SHA-1: b92bee90143957093115209974fa1cb64eae39dd SHA-256: ec5357bd807ded7eead198dbf7cfeb34a275c3c2a0043d2beac1355e299d5c04
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 0.9969

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.co/app/431946152/roblox-halloween-costume-free-game-hack PDF link annotation
    • https://ceranique.nl/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/vortex-premium-key-free-roblox_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-free-items-event_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/youtube-how-to-get-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_off000048cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CF 26256 bytes
SHA-256: 76c8c1afdfe538ee8901a260d180075f554ffedada601553b947172572a4a084
font_01_sfnt_off000085f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F3 18844 bytes
SHA-256: 91789bf72cd0f5e20fb9eb42291bc21a26ab15d01b1351c342505e5877dcab41

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