Malicious PDF — malware analysis report

Static analysis result for SHA-256 6530a4ebd1d6172e…

MALICIOUS

PDF

42.9 KB Created: 2021-05-10 14:32:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a90368a9f24609f3408d0048e80b439 SHA-1: f648ae0dd301575ed5fe6a29fe20e0d9f41313be SHA-256: 6530a4ebd1d6172efbc2e9db95829d38dbdf7800e778c79b153642fb077bfca6
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 0.9037

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/431946152/how-to-get-1-million-robux-for-free-2021-game-hack PDF link annotation
    • http://osteonad.com/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://osteonad.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://osteonad.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003a80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A80 26908 bytes
SHA-256: cac2753c711e5ba16ed4dae20bced02f577eda730ab35407a2df90af73b0b656
font_01_sfnt_off00007950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7950 2956 bytes
SHA-256: 3acb1953cd6e12ae7739d2a2a4a4364a7837dc02ec385ccd2ceaf0df73d156fc
font_02_sfnt_off00008390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8390 19072 bytes
SHA-256: 6899649986c08cd88da4e8ab8a55ee52e34bf21c69bba097983649bb28a6798f

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