Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c930bfb00c99f93…

MALICIOUS

PDF

39.2 KB Created: 2021-05-20 13:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 065123f46190e7ed6553c9676928391a SHA-1: bc5c8bbfa7ea3ac7420e942cb57e8f1c33a973af SHA-256: 9c930bfb00c99f93aaee2fee22fe08c06cafa93d4967f3fd7d21153f687db6c8
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 0.8060

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/479516143/minecraft-coins-free-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/tiktok-free-folowers-online_GM835599320.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/girl-roblox-avatar_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
font_00_sfnt_off0000365d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x365D 25172 bytes
SHA-256: 53b3080e0d4155447c6f41fbbcc4b45c9e9609eb710c5edda97d2602ba4c01cb
font_01_sfnt_off00006f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8E 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000798a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798A 17712 bytes
SHA-256: f11cf7a31a005d7bc14b9508c64b9243aa3fd98d87a18c3c2fdef7c62eb0ce9c

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