PDF malware analysis — malicious · 1df9275e79da6d0e

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 04:57:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 7f8ae9c05d248f34efd4e69f4e4655c5 SHA-1: 2934a6b666025359d78c872d9976abf0f5ae4a25 SHA-256: 1df9275e79da6d0e12f701bca4adcda5fbd57478567c414e7fa5061af156e837

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically advertising free Robux. The document body also contains similar lures and URLs, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a malicious workflow, likely involving a redirect to a malicious site or a payload download.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-robux-with-cheat-engine-6.4-game-hack In PDF document text
- https://loba.com.vn/public/upload/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-roblox-templates_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-for-free-on-phone_GM479516143.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.

Filename	Kind	Source	Size
`stream_004_off00005324.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5324	24852 bytes
SHA-256: `52bf59198f8800fbab506fbeb365514a292f5f5a2e5b5be0140369d9b6d63dc7`
`font_01_sfnt_off00008c3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C3C	19576 bytes
SHA-256: `0b6718b1820a6f29a1e44203e8d7a64f930e86f1717a5326dbed0bda98a0f4af`

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