Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d1419e31195b8d…

MALICIOUS

PDF

123.8 KB Created: 2022-06-05 12:37:01 +02:00 Authoring application: yamieli (via PDF Master 1.0.1) First seen: 2022-07-15
MD5: 85ddf5dc1f6b3d59327a8c396a6622e0 SHA-1: 01a899716f162146314d567b020cd6edfd94dae3 SHA-256: 66d1419e31195b8d69d256c628fc444c63fb9f50de56388f9a54fd0c35e31c68
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, indicating a potential link farm or a method to distribute malicious content. One heuristic specifically flagged this as a 'PDF_SEO_LINK_FARM'. The presence of multiple external URIs suggests an attempt to redirect the user to potentially harmful websites, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 3

  • 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.
  • 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://evacdir.com/brushwood/ZG93bmxvYWR8dVA4Ym5reWZId3hOalUwTkRJeU1ETTJmSHd5TlRjMGZId29UU2tnY21WaFpDMWliRzluSUZ0R1lYTjBJRWRGVGww/fanciers.bono?commentaries=TFBMIERlYnVnZ2VyTFB&
    • https://lichenportal.org/cnalh/checklists/checklist.php?clid=11135
    • https://www.lichenportal.org/cnalh/checklists/checklist.php?clid=11134
    • https://efekt-metal.pl/witaj-swiecie/
    • https://formyanmarbymyanmar.com/upload/files/2022/06/istmuYKRHXdMznJ9BKHQ_05_20fb15643bff972e0499ede6a350d2c6_file.pdf
    • https://kiubou.com/upload/files/2022/06/Qf5vlHwTmC5wklxaStlg_05_20fb15643bff972e0499ede6a350d2c6_file.pdf
    • https://wo.barataa.com/upload/files/2022/06/DFLbWi43xnXPJXu4g2GO_05_3a48fab365ea60a8495593ea2ab7b7dc_file.pdf
    • http://dev-social.mynextmatch.com/upload/files/2022/06/EzzuLt4OxTxxldhdAwbb_05_3a48fab365ea60a8495593ea2ab7b7dc_file.pdf
    • http://thingsforfitness.com/wp-content/uploads/2022/06/shadag.pdf
    • https://uk-ok.com/2022/06/05/scan-x-lifetime-activation-code-free-2022/
    • http://www.nextjowl.com/upload/files/2022/06/VWfguZaZH8ruNvl5dEjw_05_3a48fab365ea60a8495593ea2ab7b7dc_file.pdf
    • http://www.tcpdf.org
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00002126.bin
a217f12862e0ff75203bdd4136ca0d68471050be46bb09aed5306898926ffdd4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2126 120140 bytes

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