Malicious PDF — malware analysis report

Static analysis result for SHA-256 099bfd43d41bff6a…

MALICIOUS

PDF

37.0 KB Created: 2021-05-23 12:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3d8ae72bbebed1436f7cbced2502e283 SHA-1: 17b38621fb9adfe2bd8ccd4a44c1468139b529fc SHA-256: 099bfd43d41bff6afd128f97cd5e63594018c55b37914c9faf9de572a311233e
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 0.9447

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-coloring-pages-game-hack PDF link annotation
    • http://www.hhls.com.au/images/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://www.hhls.com.au/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.hhls.com.au/images/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003521.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3521 25432 bytes
SHA-256: 261926a5b97e666446fcd7ec00d37597ce3f5b703d0f1a2095093c7a4208f9be
font_01_sfnt_off00006f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 18224 bytes
SHA-256: 6e343a052bd34aead68fa90857bbbafbb2ebf9a3dc2705f241561e157218897d

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