Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa0c194d818ddb2…

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 19:22:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 27fc649ccda2282fdbb2c0d28484a042 SHA-1: 372f74c316fafa443613f848a6235251db0d4334 SHA-256: 8aa0c194d818ddb2a3891800ff79c141a9aa2bcf914b0e2fe40e4e548ea4c6a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to http://netcdn.co/app/431946152/how-to-get-free-robux-without-verification-on-ipad-game-hack, which is identified as a malicious redirector. The document body and heuristics indicate a lure for free game currency or hacks, designed to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-get-free-robux-without-verification-on-ipad-game-hack In PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-leggit_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-glames-with-gliders-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-generator-no-verfyication_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/comment-hacker-un-conte-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-free-rbx-2021-june-hack-no-generator_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-hack-scripts-android_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/fluxx-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/appcatch-free-robux_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_off00003180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3180 21880 bytes
SHA-256: 41c788a0867904a44c90973217f39eaae8a10cf6ac8db1d55ce68910451967ce
font_01_sfnt_off000061cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 19952 bytes
SHA-256: 19a929a86b7eee1ca15fa238967348527a3a3429424cb136755277bdb93115e5

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