Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffad04b604f0101a…

MALICIOUS

PDF

40.9 KB Created: 2021-05-13 23:28:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4d63c9b4044d65ccdb94c01371db9e68 SHA-1: 4e8130253f837a8b592918890a8a74725e6dd483 SHA-256: ffad04b604f0101a43549b9baedc5c0bb5892679cb4e7b671ea7a5495a8dad01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generator' or 'game hack' lures. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/free-coin-spin-game-hack', are designed to lead users to potentially harmful content or malware downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-coin-spin-game-hack In PDF document text
    • http://artindex.pro/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/link-coin-master_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://artindex.pro/images/robux-rewards_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_off00004915.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4915 23984 bytes
SHA-256: 153c919228eed5bd21b7021ce5372a76ccca9e9750ae89ccfe6cb2baafaa3be8
font_01_sfnt_off00007f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F99 17552 bytes
SHA-256: f6733490f9e98ac1c6d381232fcc744520aff3fd481443809f2500373f365ecc

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