PDF malware analysis — malicious · a7b0a520bb75b622

MALICIOUS

PDF

32.7 KB Created: 2021-07-10 00:29:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 46198c6df3e99c081a4b41a5a1459eef SHA-1: 13cb570351f179b16d9fa18e5bcdcd95083e01f0 SHA-256: a7b0a520bb75b62236a5e6339b82d99a02ecc1db6a523d428f57d3992bfacb64

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs and a document body advertising "Free Robux Hack" and similar game cheats, indicating a lure for users to download potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of external links, likely for SEO manipulation or to host further malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to facilitate the download of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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
External URI info PDF_URI

PDF contains an external URL action
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.tw/app/431946152/free-robux-hack-game-hack PDF link annotation
- https://www.misceren.com/home/misceren/public_html/upload/files/free-private-server-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-use-speed-hack-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-need-password_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/creating-faces-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-free-robux-2021-winwos-8_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-come_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-2021-robux_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/roblox-code-card-free-sin-verification_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/hack-roblox-tools_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/hack-de-una-espada-ra-roblox_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/bighead-for-free-roblox_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/cheat-engine-kill-al-script-roblox_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.

Filename	Kind	Source	Size
`font_00_sfnt_off00002c9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C9F	21516 bytes
SHA-256: `6647ffab2bb6b094ecaab77fd2508b728c6687919b94dfe60626cf6e9d97051d`
`font_01_sfnt_off00005bae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BAE	18884 bytes
SHA-256: `dc79040e010cad5ef573560dd0163568f4a40b7ac77bac9f212c194fdd2f4c7b`

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