Malicious PDF — malware analysis report

Static analysis result for SHA-256 2439379c49e62f03…

MALICIOUS

PDF

34.2 KB Created: 2021-07-19 19:43:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e45ea9a56b5ce065108e851e2cb97843 SHA-1: 2080b1ece63cd01e2ee1cb9e16c7d95476639958 SHA-256: 2439379c49e62f034d5d17b97775ac231aa27b6b210f93d1bf26fc32b2bed5e2
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 0.9955

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/431946152/robuxy-com-free-robux-game-hack PDF link annotation
    • http://imp.lg.ua/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/make-free-robux_GM431946152.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_off00002eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAC 23148 bytes
SHA-256: 7f0b1501b9dd09f1e09f373cdac12f4c85c1a7d76c45c795a69c90cfb95520fd
font_01_sfnt_off000062b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 18640 bytes
SHA-256: 895c40dcc8ab3e314fdd76083fc6d63a7047cdae3d38e24120e4d24b4e40b9b1

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