Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c128bfb11f329f6…

MALICIOUS

PDF

47.2 KB Created: 2021-05-10 15:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1d7d72dbd92235578beab962da207695 SHA-1: d07de8254c1c6afd92d35c8325eb819ce98c956d SHA-256: 5c128bfb11f329f62d94a0e3f2f5d74e72d185c2d61c6be7c125af44a417db31
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are presented as 'hacks' or 'generators' for popular games like Robux and Coin Master. This indicates a lure-based attack pattern, likely designed to redirect users to malicious sites or trick them into downloading further malware. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-free-robux-for-kids-game-hack PDF link annotation
    • http://gazelletr.com/userfiles/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/get-me-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C7 26920 bytes
SHA-256: b4e1dc5a04b8a55922a81eb6a920fb890b323a2a05613ff17313db5e25e4f2ff
font_01_sfnt_off0000882b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882B 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000953d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953D 18576 bytes
SHA-256: d8259766cf036cd113d0b26237eaaf1c704bfb1290fa2ba3336ef80e6ae93167

Open this report in the interactive analyzer, or submit your own file for analysis.