Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e522afb420015d4…

MALICIOUS

PDF

43.1 KB Created: 2021-05-23 08:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 43f2088b7f1bafcd1c0598b0e4d92a33 SHA-1: de2280cf5b346b00533f71e26948e6c48b4a11dc SHA-256: 3e522afb420015d4dec90789501455a87e15b8cd83e9f7a6b217c5ca2e49e854
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 0.8090

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/coin-master-free-spins-2021-game-hack PDF link annotation
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/pubg-uc-hack-2021_GM1330123889.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manbinjai.com/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_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_off000036f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36F8 29348 bytes
SHA-256: f2278b34b1a8a7d12cfac3edec2a22c8a83f90a8f20deb419a9e27cc0ab0a48d
font_01_sfnt_off00007525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7525 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off0000873e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873E 18288 bytes
SHA-256: 9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871

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