Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9ea592964c67ee…

MALICIOUS

PDF

36.3 KB Created: 2021-06-30 11:10:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c8094c0140ef6cd288d8d349418dd949 SHA-1: 20212af56fa15f477bc59000c93807ce1a7a76bd SHA-256: 8c9ea592964c67eead8856964fc03f4a20c8f4526324f716e20d6506a8c21089
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' content. The primary link directs to http://netcdn.co/app/431946152/hack-para-roblox-robux-infinitos-game-hack, which is flagged as a malicious redirector. The document's structure and embedded links suggest an attempt to trick the user into downloading a secondary payload, likely for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-para-roblox-robux-infinitos-game-hack In PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/appcatch-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/www-robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/pubg-uc-to-inr_GM1330123889.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/three-rubux-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-hack-roblox-for-robux-2021-april_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/como-hackear-cuentas-de-roblox-facil_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/hacks-to-walk-through-walls-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-no-downloading-apps_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_off00003540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3540 22988 bytes
SHA-256: 7fb35be60d919e45c8bf299545179f2ad77c0b7f6449ed7013370efe9d4a2f37
font_01_sfnt_off0000687e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 19176 bytes
SHA-256: 5e59592336f6ba3603a1ba66bc83136c7ac1fbdab406d85659f17c0d78411d6c

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