Malicious PDF — malware analysis report

Static analysis result for SHA-256 93dc04405ed4632c…

MALICIOUS

PDF

37.7 KB Created: 2021-05-21 04:46:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f020fe936a1b1f170d266400cfead71a SHA-1: c62190cff8d9456d94498bcfc01c30ad69030bcb SHA-256: 93dc04405ed4632cde350949284cf0e0db8557acbd9fab26495b4de9fa1eadd7
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 0.9447

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/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/free-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-ios-app_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
stream_002_off0000314b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314B 26632 bytes
SHA-256: 0be50c854bcc5f7a91e722fed3992ab8f9823fc4e4be72c14f07c97b98673f87
font_01_sfnt_off00006e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 19556 bytes
SHA-256: 08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8

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