Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2539d5b41cdc6f…

MALICIOUS

PDF

40.0 KB Created: 2021-05-10 13:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 89d719f69ba411e28062bab624c2dd76 SHA-1: 8b83cf72451c71be605355c4cc5db02660e0fc16 SHA-256: fa2539d5b41cdc6f16ba756622f16e753340af9d91aa2ff41e6c18532b11ebc7
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 0.9972

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-hacks-for-free-spins-game-hack PDF link annotation
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-pet-snacks-coin-master_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_003_off0000428e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x428E 24940 bytes
SHA-256: 61d8d1e5c25cb089def726e3e6912939a27a270ece47bfa6c56fded2c5c9f456
font_01_sfnt_off00007b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 18056 bytes
SHA-256: 12d79a7ddbb75c7a0854102822057d5441bee2ca4a20c79f8211a3d0b9a1f375

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