Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bc5cb562b34dfa…

MALICIOUS

PDF

30.5 KB Created: 2021-07-19 00:48:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2ac4fe97eec95febe3995e7a98d1e9a3 SHA-1: 9d759b5a6d49b673456391f0841dc7b56333631a SHA-256: 15bc5cb562b34dfafadffd082f5a20bacea5de32e0632f635a7af09771f6aa6c
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 0.9292

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 http://netcdn.tw/app/479516143/was-minecraft-ever-free-game-hack PDF link annotation
    • https://www.bmta.co.uk/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2567 22352 bytes
SHA-256: 000325c5906ffb0ff7f2493d18d00c5566c04c0675ac44c9d8ebb45ac51f3453
font_01_sfnt_off000056c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C5 17880 bytes
SHA-256: fa9564ce5793f03604dae66ea4261aaef87f9e1e7420b634dd5196a1b51aa919

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