Malicious PDF — malware analysis report

Static analysis result for SHA-256 9502180332adfd5f…

MALICIOUS

PDF

39.3 KB Created: 2021-05-25 08:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a1413d1ebf01eea7a161efa24c74f443 SHA-1: c771a1d7626a7fbb006b0f6ba5f200556f6df818 SHA-256: 9502180332adfd5fdeab93a8ae07d42750a4fd937d9d832367ce33dae87a08f5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free spin link for coin master game' and a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action. It embeds multiple URLs, including one pointing to a suspected malicious redirector. The ML classifier also flagged the PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/free-spin-link-for-coin-master-game-game-hack PDF link annotation
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.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_off00003491.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3491 25048 bytes
SHA-256: 180e18dacb971255920af4a984c9f56ff1dd097bcbc8450d901ee87987795adf
font_01_sfnt_off00006e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000781c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781C 18316 bytes
SHA-256: 4ad106dc66915d7a7c54c506e35e2e74cb7406920644c521a55874c4c44ea7c2

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