Malicious PDF — malware analysis report

Static analysis result for SHA-256 237c85e7dc601a5c…

MALICIOUS

PDF

43.3 KB Created: 2021-05-20 14:12:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bfcfb27435d630838e21924678c810cc SHA-1: 64c25d79369ffe42ad1673d6e82cef9fc70c8adf SHA-256: 237c85e7dc601a5c58d738fbdd6a256bacb03dd8144437098af2362a26f81249
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 0.7947

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-link-today-new-game-hack PDF link annotation
    • https://www.bmta.co.uk/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-hack-mod-apk-35-8_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003577.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3577 25372 bytes
SHA-256: acff4a4565b583942f9fa357937c9fdd3fe1d7966a7b99b2ac037ebb20bd5148
font_01_sfnt_off00006f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F15 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00007cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB6 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off000086a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 18572 bytes
SHA-256: 51c95658009ee6a6ae875a8d4133a79c51d36fbd34bac1203a2f2fe060da7c96

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