Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89ae30de7113ac4…

MALICIOUS

PDF

36.8 KB Created: 2021-06-30 03:26:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3795a739a001bd08349049b749e2ee3b SHA-1: 1be5b39de43ea7604215bef7f5312852e07fef28 SHA-256: e89ae30de7113ac4583ad618b5a9fe6524734e9200d78160b2959e9ffcaa7434
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and a call-to-action phrase, directing users to a URL associated with known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary lure appears to be related to obtaining free Robux, a common theme in phishing and scam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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-2021-site-youtube.com-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-accounts-2021-bugmenot_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/action-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/elysian-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/rose-v1-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3484 22912 bytes
SHA-256: 4d4f0ade27b0c56960458c6d782c053305ee21fadf5a3977b8ff74318fe96db6
font_01_sfnt_off000067fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 19992 bytes
SHA-256: d8489a9972ee819bfb80806e63834348b00efe0184b3ba71a1f8f2a801f5a4bb

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