Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71cb62a0ec37518…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 13:02:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5eaa2af7ec941f41b7cb5701cfedc819 SHA-1: de59638ef7d5742947112a348e75e480466f6133 SHA-256: c71cb62a0ec37518ce110f56a7d411278f99c016cd635893f2b043e0a7bd9bc0
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 0.9492

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/479516143/free-minecraft-realm-codes-game-hack PDF link annotation
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/pubg-uc-hack-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/robux-gainer_GM431946152.pdfIn PDF document text
    • https://www.maverickengineers.com/uploaded_files/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.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_off000034bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34BF 24884 bytes
SHA-256: 641161fc176dade53a870e1697d16e3358ccc0f42bdf912946d0939e59ef9929
font_01_sfnt_off00006d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D54 18216 bytes
SHA-256: 112831491273e470c6e89805da9a532ffdffe59a8001213273075a33f4492bfc

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