Malicious PDF — malware analysis report

Static analysis result for SHA-256 17522fccfbd46efa…

MALICIOUS

PDF

39.5 KB Created: 2021-05-22 09:15:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 80a1267dc17355e92fa566641083892c SHA-1: 58be7d046a2955d8359caf34513ad88f0382f8fd SHA-256: 17522fccfbd46efae579c5146dad6cba34d3d5b3c13ffc02cbf96d51fc9a7b7d
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/479516143/minecraft-realms-free-codes-game-hack PDF link annotation
    • https://bancroftandsons.com/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-spin-hack-without-verification_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_off000033e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E7 25432 bytes
SHA-256: f44e27b139b15d821f7453c5d1dff55d173c90e416568275bc2b876cab3d6762
font_01_sfnt_off00006e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E52 3160 bytes
SHA-256: 34eac6cd1cb3fab8f480dda782f3cd972a8df4408e9f9b0014e8cb6873761c85
font_02_sfnt_off00007942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7942 18216 bytes
SHA-256: 30a8f83054e231b1bb485b1ca025b33fda8ee43bcea67b958af1de796f39c45f

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