Malicious PDF — malware analysis report

Static analysis result for SHA-256 97acd50c5c442160…

MALICIOUS

PDF

39.1 KB Created: 2021-05-20 23:21:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5c79abf8b2227509ca5e2dccfe4b3352 SHA-1: f6ed144023178cba5232d93e748d94a901ad7a7b SHA-256: 97acd50c5c4421608700d246c0ccec340596a91e068cfd02531aba70c16c3ab1
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 0.8060

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/how-to-get-free-spins-and-coins-on-coin-master-game-hack PDF link annotation
    • http://autoskola-scp.com/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-promo-code_GM406889139.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_002_off00003474.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3474 25196 bytes
SHA-256: 66986983c7fa23874fc7c4672cf34e9ddfbd0b366003a866bbbb2881e3c87b45
font_01_sfnt_off00006dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC7 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00007768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7768 18224 bytes
SHA-256: c3eeb8e5bbecb0a66d0dccf890560b2772aaf25cfcf2943a976e8e45774626aa

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