Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd70638fd2b5c21…

MALICIOUS

PDF

44.3 KB Created: 2021-05-16 19:06:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48384593e2bb1af6e3fd52f588dedb00 SHA-1: 55566b5aab3447454222a261711391d4261df256 SHA-256: 8dd70638fd2b5c21c4f1e2819e958a791769a50f221a581fe3a7a589689056ae
100 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a visual download button, strongly suggesting a lure to download a malicious application. The ML classifier and the PDF redirector heuristic confirm the malicious nature of the document. The primary IOC is the URL leading to a known malicious redirector, which likely serves the final payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-hack-apk-3.5-33-game-hack In PDF document text
    • http://pdia.de/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/www-robux-us_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://pdia.de/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://pdia.de/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pdia.de/images/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://pdia.de/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004851.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4851 24784 bytes
SHA-256: 5766cbde9fe326c0d7dfa2d027c56fd328988a6e5e6c3f1e2c9747eb8b6af22e
font_01_sfnt_off00008070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A56 18268 bytes
SHA-256: 207b50af2482ee3d64012f5b90db49de9a3b7179575478186b363639781f396d