PDF malware analysis — malicious · 4400786c40116c58

MALICIOUS

PDF

35.5 KB Created: 2021-06-30 08:41:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: c5c8a255c37079dff7a94cc0ef6ba280 SHA-1: bb037ef669f5285310987eaf69f45fdc7bdd8ce0 SHA-256: 4400786c40116c5839cc8efca2353d4c862a27f4dd95b5fa71a029f2537af6a9

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game cheats and virtual currency. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent. The document body and extracted URLs suggest a lure to potentially malicious sites that may host malware or phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-to-hack-hole-in-the-wall-roblox-game-hack PDF link annotation
- https://radiocaxias.com.br/portal/imagens/files/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/get-free-robux-com_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/800-robux-hack_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-privat-server_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/get-more-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/cara-cheat-roblox-android_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-ninja-animation-pack-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/gary-s-hod-infinite-life-hack-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/get-1-million-robux-free_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_off000033ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33CA	22452 bytes
SHA-256: `86717a218a6a6b041617ef6d959a914dde273e4b7c9121ec6bb107362f2eedfb`
`font_01_sfnt_off0000656e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x656E	19184 bytes
SHA-256: `4807a42de8cb30f20e3527a990e82e73269e84347b069487d6d07338dfe45633`

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