Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c28d422753dcf3f…

MALICIOUS

PDF

40.4 KB Created: 2021-05-22 08:14:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6f342188d34dd23a24c8d4d3b0780805 SHA-1: 63be5784c58a717f34aadf8c63f600f1e007dfaf SHA-256: 8c28d422753dcf3fd6cf62f6affda52562f1a3ec9111afcf98df51201f988217
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 0.7718

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/roblox-hack-me-game-hack PDF link annotation
    • http://mittlenberg.ch/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/moonactive-free-spins_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003389.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3389 25680 bytes
SHA-256: 29b13211e2b21fe508a83b678ed8d0dd811cc8ec172a9332037f71231bb802a4
font_01_sfnt_off00006ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF7 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C09 18376 bytes
SHA-256: aef395c884b1121fa113f915db4056a7b0027cd471dc4d96a5cdd03c50f60cf3

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