Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c871312cb9e807a…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 17:18:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4d005900f5ef606fd7a7ef3b5f4abe7a SHA-1: a462fdb6f29fff8566dc805fd437b4c2d8877437 SHA-256: 6c871312cb9e807ae032c5ef187bbc145e12e7ced1417a4a3daea43084026a1c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains links to known malicious redirector infrastructure, specifically pointing to game hack download sites. The presence of a visual download button and the document body content further support the lure of downloading a potentially malicious application. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-3.2-mod-hack-apk-download-game-hack In PDF document text
    • https://www.utalii.ac.ke/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/instantrobux_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/flame-gg-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
stream_003_off000049cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CC 24604 bytes
SHA-256: cf74739fcf136c9d97b96e3dccacf0d776bdf99896fab90d6f7b67a9d25de015
font_01_sfnt_off000080d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D1 18836 bytes
SHA-256: ff135a53a420a418677011958d681f26302d42eb767583c3b8513888fb402d9d