Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4a4d00b5afb170…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 07:00:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 966bcf09a07b364fb83eaad6b860a727 SHA-1: 33e2a6b6a5338ab1e99fd54cd4639b7db652a35c SHA-256: 8c4a4d00b5afb170b5c18778f4ba41b9d2193224534e59b9506895b5342196c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, masquerading as 'free generators' or 'game hacks' for popular games. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-roblox-website-game-hack. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. No scripts were extracted, but the presence of multiple malicious links indicates a high likelihood of redirecting users to further malicious content or phishing sites.

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/431946152/free-roblox-website-game-hack In PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_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_off000048f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F9 26880 bytes
SHA-256: 2c1871da96234a6133ec6e35a13e0039469f60ba5406d58e19879850e29ccf4f
font_01_sfnt_off00008572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 18372 bytes
SHA-256: 4f49704c3d2016fd3d486e698c5af7a9a5561cf776b84bb9dfcb3ffa887994c7

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