Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d72a1e795bb153…

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 01:39:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1a068e0c256d58eaa99e83667d14bae7 SHA-1: 2f53bead352547e1ce6876c14a0af503f71a9dcd SHA-256: e1d72a1e795bb153e3bbee68f0efbdd1e91517635cc1b6ca2b3ad2885b1b4369
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links and embedded text that lure users into clicking on promises of game hacks and free currency. The primary link, 'https://netcdn.xyz/app/431946152/where-to-get-robux-game-hack', is flagged as a redirector for game hacks. The document's structure and content strongly suggest a social engineering tactic to drive users to potentially malicious websites for downloads or further phishing. No scripts were extracted, but the PDF's nature as a lure is clear.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/where-to-get-robux-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/games-for-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-on-phone_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
stream_003_off000047c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C1 26144 bytes
SHA-256: 44fd527f575bb6bb0be8de9c58af8929f2988de9f58a550bda9da8f1dd9e4d6d
font_01_sfnt_off000082e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E6 18316 bytes
SHA-256: 5d084a82250710db6b98a0dc3f702c66b679dd89c140e62c2649391066269139

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